Tidy use-external-baros

[peterbarker]

Note the weirdism around checking definition of AP_BARO_MSP_ENABLED - which will always be defined...

Board               AP_Periph  blimp  bootloader  copter  heli  iofirmware  plane  rover  sub
Durandal                       *      *           *       *                 *      *      *
HerePro             *                                                                     
Hitec-Airspeed      *                                                                     
KakuteH7-bdshot                *      *           *       *                 *      *      *
MatekF405                      0      *           0       -8                -8     0      -8
Pixhawk1-1M-bdshot             -16                -16     -16               -24    -16    -16
f103-QiotekPeriph   *                                                                     
f303-Universal      *                                                                     
iomcu                                                           *                         
revo-mini                      -16    *           -16     -16               -16    -16    -16
skyviper-v2450                                    *                                       

A lot fo

These are the boards whose hwdefs are being modified. They seem to hae been setting this for no particularly good reason as they were getting the feature anyway.

Board             AP_Periph  blimp  bootloader  copter  heli  plane  rover  sub
F35Lightning                 0      *           -8      -8    0      0      0
FlywooF745Nano               -8     *           -8      -8    0      0      -8
JHEMCU-GSF405A               -8     *           -8      -8    -8     -8     -8
KakuteF7                     8      *           8       16    8      16     16
MatekF405                    0      *           0       -8    -8     0      -8
MatekH743-periph  *                                                         
SuccexF4                     -8     *           -8      -8    -8     -8     -8
f303-Universal    *                                                         
revo-mini                    -16    *           -16     -16   -16    -16    -16
revo-mini-i2c                -8     *           -8      -8    -8     -8     -8
speedybeef4                  0      *           0       0     -8     0      -8

[khancyr]

LGTM, follow the same pattern as other lib

HAL_MINIMIZE_FEATURES handling is moved to minimize_features.inc

AP_BARO_PROBE_EXTERNAL_I2C_BUSES definition is handle by the ap_baro_config.h which is good