AP_Airspeed: keep references to state and params in backend

[peterbarker]

... much as we do for GPS, rangefinder and several other libraries

[peterbarker]

There are probably a few more hundred bytes to be saved in the calibration stuff yet.

----------------------------  ---------  -----  ----------  ------  ----  ----------  -----  -----  ----
Board                         AP_Periph  blimp  bootloader  copter  heli  iofirmware  plane  rover  sub
3DRControlZeroG                          16     *           -288    -336              -296   -368   -344
ACNS-CM4Pilot                            16     *           -8      -32               -256   -144   -232
ACNS-F405AIO                             8      *           168     296               -88    -128   -208
AEROFOX-H7                               -8     *           -368    -384              -440   -392   -352
AET-H743-Basic                           -32    *           -232    -224              -160   -176   -256
AIRLink                                  -32    *           -336    -328              -336   -408   -432
AR-F407SmartBat               *                 *
ARKV6X                                   0      *           -344    -336              -344   -376   -384
ARK_CANNODE                   *                 *
ARK_GPS                       *                 *
ARK_RTK_GPS                   *                 *
AeroFox-Airspeed              -56               *
AeroFox-Airspeed-DLVR         -64               *
AeroFox-GNSS_F9P              *                 *
AeroFox-PMU                   *                 *
Airvolute-DCS2                           -24    *           -224    -216              -224   -152   -136
AnyleafH7                                -32    *           -216    -208              -184   -176   -184
Aocoda-RC-H743Dual                       -24    *           -240    -232              -88    -272   -392
AtomRCF405NAVI                           16     *           0       -8                -208   -184   -192
BETAFPV-F405                                    *           -136
BeastF7                                  -16    *           -136    8                 -168   -192   -208
BeastF7v2                                -16    *           -136    16                -168   -184   -208
BeastH7                                  -8     *           -328    -328              -344   -384   -392
BeastH7v2                                -8     *           -328    -328              -344   -384   -392
BirdCANdy                     *                 *
BlitzF745                                -16    *           -136    8                 -168   -184   -208
BlitzF745AIO                             24     *           40      48                -160   -176   -200
BlitzH743Pro                             0      *           -192    -192              -192   -160   -80
BlitzMiniF745                            -16    *           -136    16                -168   -192   -208
BlitzWingH743                            0      *           -192    -192              -192   -168   -72
BotBloxDroneNet               *                 *
C-RTK2-HP                     *                 *
CBU-H7-LC-Stamp                          16     *           -192    -192              -280   -168   -160
CBU-H7-Stamp                             0      *           -200    -216              -160   -176   -184
CSKY405                                  40     *           -24     16                -168   -136   -200
CUAV-7-Nano                              16     *           -360    -360              -152   -352   -288
CUAV-Nora                                -8     *           -352    -376              -368   -376   -368
CUAV-Nora-bdshot                         0      *           -368    -384              -440   -400   -360
CUAV-Pixhack-v3                          8                  -200    -192              256    -184   -312
CUAV-X7                                  -8     *           -344    -376              -360   -376   -368
CUAV-X7-bdshot                           0      *           -368    -376              -432   -400   -360
CUAV_GPS                      *                 *
CUAVv5                                   -48    *           -368    -344              -296   -400   -368
CUAVv5-bdshot                            -48    *           -336    -360              -312   -392   -408
CUAVv5Nano                               -40    *           -336    -336              152    -360   -368
CUAVv5Nano-bdshot                        -48    *           -344    -352              -344   -360   -424
CarbonixF405                  *                 *
CarbonixL496                  *                 *
CrazyF405                                       *           -120
CubeBlack                                8      *           -368    -336              136    -368   -480
CubeBlack+                               0      *           -360    -328              144    -368   -480
CubeBlack-periph              *                 *
CubeGreen-solo                                  *           -368
CubeNode                      16                *
CubeNode-ETH                  *                 *
CubeOrange                               -8     *           -344    -376              -360   -376   -368
CubeOrange-ODID                          -56    *           -344    -336              -456   -400   -376
CubeOrange-SimOnHardWare                                    -320
CubeOrange-bdshot                        -8     *           -368    -384              -440   -400   -352
CubeOrange-joey                          -8     *           -352    -376              -368   -376   -368
CubeOrange-periph             *                 *
CubeOrange-periph-heavy       16                *
CubeOrangePlus                           -16    *           -328    -328              -328   -360   -352
CubeOrangePlus-SimOnHardWare                                -368
CubeOrangePlus-bdshot                    -16    *           -328    -336              -360   -360   -400
CubePurple                               -40    *           -208    -216              -240   -184   -232
CubeRedPrimary                           0      *           -216    -216              -160   -184   -240
CubeRedPrimary-PPPGW          *                 *
CubeRedSecondary                         16     *           -192    -192              -200   -152   -296
CubeSolo                                        *           -360
CubeYellow                               -32    *           -336    -328              -336   -408   -432
CubeYellow-bdshot                        -32    *           -336    -336              -344   -392   -352
DevEBoxH7v2                              24     *           -32     -24               -56    -168   -216
DrotekP3Pro                              8      *           -344    -344              -96    -368   -360
Durandal                                 -8     *           -344    -376              -368   -376   -368
Durandal-bdshot                          0      *           -368    -384              -432   -400   -360
F35Lightning                             -8     *           -120    0                 -144   -176   -208
F4BY                                     -8     *           8       8                 -208   -160   -120
F4BY_F427                                32     *           -328    -320              -488   -392   -400
FlyingMoonF407                           -8     *           8       8                 -208   -160   -120
FlyingMoonF427                           16     *           -328    -336              -264   -360   -376
FlyingMoonH743                           8      *           -296    -304              -304   -360   -376
FlywooF405HD-AIOv2                              *           40
FlywooF405Pro                            -16    *           -136    8                 -168   -192   -208
FlywooF405S-AIO                                 *           40
FlywooF745                               0      *           8       16                -64    -160   -184
FlywooF745Nano                           0      *           8       16                -64    -160   -184
FlywooH743Pro                            -24    *           -240    -256              -384   -208   -288
FoxeerF405v2                             -8     *           -120    0                 -144   -176   -216
FoxeerH743v1                             -8     *           -240    -248              -192   -224   -240
FreeflyRTK                    *                 *
G4-ESC                        *                 *
GEPRCF745BTHD                            40     *           168     24                -224   -144   -216
GEPRC_TAKER_H743                         -24    *           -240    -256              -384   -208   -288
H757I_EVAL                                      *
H757I_EVAL_intf                                 *
HEEWING-F405                                    *                                     -168
HEEWING-F405v2                                  *                                     -168
Here4AP                       *                 *
Hitec-Airspeed                -40               *
HitecMosaic                   *                 *
HolybroF4_PMU                 *                 *
HolybroG4_Airspeed            -24               *
HolybroG4_Compass             *                 *
HolybroG4_GPS                 *                 *
HolybroGPS                    *                 *
IFLIGHT_2RAW_H7                          -8     *           -240    -240              -248   -224   -288
JFB100                                   -16    *           -344    -328              -368   -344   -352
JFB110                                   8      *           -296    -304              -304   -352   -368
JHEMCU-GSF405A                                  *           -136
JHEMCU-GSF405A-RX2                              *           -144
JHEMCU-H743HD                            -24    *           -256    -240              -640   -232   -304
JHEM_JHEF405                             8      *           88      128               -136   -136   -184
KakuteF4                                 -16    *           -120    0                 -144   -176   -216
KakuteF4-Wing                            -16    *           -136    16                -168   -192   -208
KakuteF4Mini                             -16    *           -144    8                 -288   -192   -208
KakuteF7                                 16     *           0       -8                -216   -192   -192
KakuteF7-bdshot                          16     *           72      0                 -80    -168   -208
KakuteF7Mini                             -16    *           -144    8                 -288   -192   -208
KakuteH7                                 -16    *           -216    -216              -400   -200   -256
KakuteH7-Wing                            -40    *           -224    -240              -168   -176   -256
KakuteH7-bdshot                          48     *           -376    -416              -264   -208   -272
KakuteH7Mini                             -8     *           -240    -248              -192   -224   -240
KakuteH7Mini-Nand                        8      *           -232    -240              -256   -208   -256
KakuteH7v2                               8      *           -232    -240              -256   -208   -264
LongBowF405WING                          16     *           8       0                 -184   -184   -192
MFE_AirSpeed_CAN              -64               *
MFE_POS3_CAN                  *                 *
MFT-SEMA100                              -32    *           -192    -176              -232   -160   -200
MUPilot                                  -32    *           -328    -336              -336   -408   -432
MambaF405-2022                           -8     *           32      -192              -120   -144   -152
MambaF405US-I2C                          -8     *           -120    0                 -144   -176   -208
MambaF405v2                              -8     *           32      -192              -120   -152   -152
MambaH743v4                              40     *           -336    -328              -408   -360   -376
MatekF405                                16     *           0       -8                -216   -184   -192
MatekF405-CAN                            16     *           0       -24               -216   -144   -224
MatekF405-STD                            16     *           8       -8                -208   -192   -192
MatekF405-TE                             40     *           -8      8                 -152   -136   -208
MatekF405-TE-bdshot                      40     *           8       40                -176   -144   -192
MatekF405-Wing                           32     *           56      16                -328   -184   -248
MatekF405-Wing-bdshot                    32     *           144     24                -256   -176   -240
MatekF405-bdshot                         16     *           72      0                 -80    -168   -208
MatekF765-SE                             0      *           -192    -184              -200   -160   -216
MatekF765-Wing                           -16    *           -280    -272              -168   -240   -200
MatekF765-Wing-bdshot                    -40    *           -272    -272              -272   -240   -72
MatekG474-DShot               *                 *
MatekG474-GPS                 *                 *
MatekG474-Periph              -32               *
MatekH743                                0      *           -200    -184              -216   -144   -216
MatekH743-bdshot                         -8     *           -192    -184              -336   -152   -192
MatekH743-periph              -8                *
MatekH7A3                                0      *           -192    -192              -192   -168   -72
MatekL431-ADSB                *                 *
MatekL431-APDTelem            *                 *
MatekL431-Airspeed            -24               *
MatekL431-BattMon             *                 *
MatekL431-DShot               *                 *
MatekL431-EFI                 *                 *
MatekL431-GPS                 *                 *
MatekL431-HWTelem             *                 *
MatekL431-MagHiRes            *                 *
MatekL431-Periph              -8                *
MatekL431-Proximity           *                 *
MatekL431-RC                  *                 *
MatekL431-Rangefinder         *                 *
MatekL431-Serial              *                 *
MatekL431-bdshot              *                 *
MazzyStarDrone                           0      *           8       0                 -296   -192   -280
MicoAir405Mini                           16     *           8       0                 -104   -192   -208
MicoAir405v2                             16     *           8       0                 -104   -192   -208
MicoAir743                               -40    *           -224    -240              -168   -176   -256
MicoAir743-AIO                           -24    *           -240    -264              -384   -208   -288
MicoAir743v2                             -24    *           -240    -256              -384   -208   -288
Nucleo-G491                   *                 *
Nucleo-L476                   -104              *
Nucleo-L496                   -112              *
NucleoH743                                      *
NucleoH755                                      *
NxtPX4v2                                 -24    *           -240    -256              -384   -208   -288
OMNIBUSF7V2                              32     *           120     32                -112   -144   -216
OmnibusNanoV6                            -8     *           -120    0                 -144   -176   -216
OmnibusNanoV6-bdshot                     -16    *           -136    8                 -168   -184   -208
OrqaF405Pro                              0      *           40      -200              -120   -152   -152
PH4-mini                                 -40    *           -336    -336              144    -360   -368
PH4-mini-bdshot                          -48    *           -344    -352              -344   -360   -424
Pix32v5                                  -32    *           -328    -336              -336   -408   -432
PixC4-Jetson                             16     *           -296    -312              -304   -352   -368
PixFlamingo                              32     *           -384    -408              -248   -368   -296
PixFlamingo-F767                         -40    *           -408    -376              -432   -440   -432
PixPilot-C3                              -32    *           -368    -344              -280   -344   -360
PixPilot-V3                              8      *           -360    -328              136    -368   -480
PixPilot-V6                              -8     *           -344    -376              -368   -376   -368
PixPilot-V6PRO                           0      *           -368    -384              -432   -400   -360
PixSurveyA1                              8      *           -200    -192              256    -184   -312
PixSurveyA1-IND                          0      *           -368    -336              144    -368   -488
PixSurveyA2                              -8     *           -344    -376              -368   -376   -368
Pixhawk1                                 -40    *           -208    -216              -240   -192   -232
Pixhawk1-1M                              48     *           24      -80               -248   -120   -120
Pixhawk1-1M-bdshot                       48                 40      -88               -144   -120   -112
Pixhawk1-bdshot                          -40                -208    -208              -304   -184   -232
Pixhawk4                                 -48    *           -368    -344              -296   -400   -360
Pixhawk4-bdshot                          -48    *           -336    -360              -312   -392   -408
Pixhawk5X                                -32    *           -336    -328              -336   -408   -432
Pixhawk6C                                0      *           -368    -376              -440   -400   -360
Pixhawk6C-bdshot                         -8     *           -368    -376              -432   -392   -352
Pixhawk6X                                -8     *           -328    -336              -192   -352   -328
Pixhawk6X-ODID                           0      *           -360    -344              -264   -400   -384
Pixhawk6X-PPPGW               *                 *
Pixhawk6X-bdshot                         -8     *           -336    -336              -192   -352   -328
Pixracer                                 -64    *           -352    -344              -256   -336   -240
Pixracer-bdshot                          -72    *           -360    -352              -128   -352   -264
Pixracer-periph               0                 *
QioTekAdeptF407                          -32    *           24      -24               -152   -152   -192
QioTekZealotF427                         24     *           -328    -344              -360   -352   -312
QioTekZealotH743                         -8     *           -352    -376              -368   -376   -368
QioTekZealotH743-bdshot                  0      *           -368    -384              -440   -400   -360
R9Pilot                                  0      *           -264    -272              -224   -264   -184
RADIX2HD                                 16                 16      8                 -160   -168   -240
RadiolinkPIX6                            8      *           -200    -200              -56    -160   -208
ReaperF745                               0      *           8       8                 -176   -160   -192
SDMODELH7V1                              8      *           -232    -240              -256   -208   -264
SDMODELH7V2                              48     *           -376    -416              -264   -200   -280
SITL_arm_linux_gnueabihf                 -48                560     424               392    456    480
SITL_x86_64_linux_gnu                    0                  480     480               480    480    480
SIYI_N7                                  8      *           -304    -328              -296   -368   -416
SPRacingH7                               8      *           16      -8                -32    -208   -216
SPRacingH7RF                             -8     *           16      -24               -32    -232   -232
Sierra-F405                   *                 *
Sierra-F412                   *                 *
Sierra-F9P                    *                 *
Sierra-L431                   -24               *
Sierra-PrecisionPoint         *                 *
Sierra-TrueNavIC              *                 *
Sierra-TrueNavPro             *                 *
Sierra-TrueNavPro-G4          *                 *
Sierra-TrueNorth              *                 *
Sierra-TrueSpeed              -40               *
SkySakuraH743                            -40    *           -224    -240              -168   -176   -256
SkystarsH7HD                             24     *           -336    -336              -296   -416   -352
SkystarsH7HD-bdshot                      24     *           -336    -344              -264   -376   -352
SpeedyBeeF405Mini                        -16    *           -136    16                -168   -192   -208
SpeedyBeeF405WING                        16     *           56      -8                -32    -176   -216
SuccexF4                                 -8     *           -72     -56               -232   -144   -160
Swan-K1                                         *                                     144
TBS-Colibri-F7                           -56    *           -336    -328              -336   -376   -344
TBS_LUCID_H7                             -40    *           -224    -232              -168   -176   -256
TBS_LUCID_PRO                            0      *           40      -200              -120   -144   -152
TMotorH743                               0      *           -240    -256              -192   -224   -240
VRBrain-v51                              -8     *           -8      -32               -320   -160   -288
VRBrain-v52                              0      *           0       -24               -320   -160   -280
VRBrain-v54                              -8     *           -280    -304              -232   -280   -272
VRCore-v10                               -8     *           -8      -32               -320   -160   -288
VRUBrain-v51                             0      *           80      -40               -256   -184   -288
VUAV-V7pro                               -8     *           -368    -384              -440   -392   -352
X-MAV-AP-H743v2                          -40    *           -224    -232              -168   -176   -256
YJUAV_A6                                 -16    *           -344    -352              -368   -376   -368
YJUAV_A6SE                               -40    *           -24     -24               16     -208   -184
YJUAV_A6SE_H743                          0      *           -368    -384              -440   -400   -360
YJUAV_A6Ultra                            -8     *           -368    -376              -432   -392   -352
ZeroOneX6                                -8     *           -344    -352              -504   -352   -328
ZubaxGNSS                     *                 *
airbotf4                                 8      *           32      -8                -168   -160   -288
bbbmini                                  0                  504     440               520    536    456
bebop                                    0                  460     432               460    412    444
blue                                     0                  472     472               520    488    488
canzero                                  32                 440     472               424    488    488
crazyflie2                                      *           -8
edge                                     0                  424     472               488    488    520
erlebrain2                               0                  432     396               384    448    448
f103-ADSB                     -64               *
f103-Airspeed                 -64               *
f103-GPS                      *                 *
f103-HWESC                    *                 *
f103-QiotekPeriph             -56               *
f103-RangeFinder              *                 *
f103-Trigger                  *                 *
f303-GPS                      *                 *
f303-HWESC                    *                 *
f303-M10025                   -112              *
f303-M10070                   -104              *
f303-MatekGPS                 -8                *
f303-PWM                      *                 *
f303-TempSensor               *                 *
f303-Universal                -16               *
f405-MatekAirspeed            -16               *
f405-MatekGPS                 -16               *
fmuv2                                    56                 48      48                -64    -112   -104
fmuv3                                    8      *           -200    -192              256    -184   -312
fmuv3-bdshot                             8                  -216    -200              -200   -176   -344
fmuv5                                    -48    *           -368    -344              -296   -400   -368
iomcu                                                                     *
iomcu-dshot                                                               *
iomcu-f103                                                                *
iomcu-f103-8MHz-dshot                                                     *
iomcu-f103-dshot                                                          *
iomcu_f103_8MHz                                                           *
luminousbee4                             -16                -360    -384              -336   -440   -408
luminousbee5                             0      *           -360    -352              -544   -336   -352
mRo-M10095                    *                 *
mRoCANPWM-M10126              *                 *
mRoCZeroOEMH7-bdshot                     16     *           -288    -336              -288   -368   -344
mRoControlZeroClassic                    8      *           -296    -304              -304   -360   -376
mRoControlZeroF7                         8      *           -320    -336              -352   -376   -360
mRoControlZeroH7                         -32    *           -344    -328              -384   -368   -360
mRoControlZeroH7-bdshot                  -32    *           -320    -312              -504   -368   -344
mRoControlZeroOEMH7                      24     *           -264    -296              -280   -408   -344
mRoKitCANrevC                 -112              *
mRoNexus                                 0      *           -320    -320              -248   -360   -352
mRoPixracerPro                           16     *           -272    -296              -272   -408   -344
mRoPixracerPro-bdshot                    16     *           -288    -336              -296   -376   -344
mRoX21                                   0      *           -360    -328              144    -368   -480
mRoX21-777                               -16    *           -352    -352              -376   -336   -360
mindpx-v2                                48     *           -216    -224              -128   -176   -192
mini-pix                                 -16    *           -8      -32               -264   -224   -208
modalai_fc-v1                            -56    *           -312    -320              -264   -344   -272
navigator                                0                  464     448               508    480    448
navio                                    0                  432     448               432    480    480
navio2                                   0                  496     428               480    480    320
obal                                     0                  364     368               428    -3652  444
omnibusf4                                8      *           32      136               -112   -168   -168
omnibusf4pro                             0      *           32      136               -112   -168   -168
omnibusf4pro-bdshot                      8      *           16      224               -184   -184   -160
omnibusf4pro-one                         24     *           184     32                -256   -64    -216
omnibusf4v6                              -8     *           -120    0                 -144   -176   -216
pxf                                      0                  352     336               460    476    444
pxfmini                                  0                  432     396               384    448    448
rFCU                                            *
rGNSS                         *                 *
revo-mini                                32     *           184     32                -184   -152   -200
revo-mini-bdshot                         24     *           104     16                -192   -160   -256
revo-mini-i2c                            -8     *           -120    0                 -144   -176   -216
revo-mini-i2c-bdshot                     -16    *           -136    16                -168   -184   -208
revo-mini-sd                                    *
skyviper-f412-rev1                                          8
skyviper-journey                                            *
skyviper-v2450                                              *
sparky2                                  -8     *           -32     40                -96    -80    -192
speedybeef4                              -16    *           -120    0                 -144   -176   -208
speedybeef4v3                            16     *           8       0                 -184   -184   -192
speedybeef4v4                            16     *           56      -8                -16    -168   -208
sw-boom-f407                  *                 *
sw-nav-f405                   *                 *
sw-spar-f407                  *                 *
thepeach-k1                              8      *           -192    -192              -248   -176   -224
thepeach-r1                              8      *           -192    -192              -248   -176   -224