This is because NuttX uses a different assignment for variables.

Replaced with the more generic serial config params.

rc.mavlink contains automatic transition support that can be removed after
the next release.

Replaced with the more general serial config params.

- only a few configs done yet

Modify 500001_axialracing_ax10 to utilize rc.ugv_defaults to allow deprecating rc.axialracing_ax10_apps and rc.axialracing_ax10_defaults and update CMakeLists.txt.

Signed-off-by: Roman <bapstroman@gmail.com>

Remove logic from rc.vehicle_setup that resulted in redundantly setting the MAV_TYPE to the same initial default value set within the script.

Alphabetize vehicle type logic block order and Update param set MAV_TYPE  logic to only set the parameter if no MAV_TYPE was previously set.

 - remove all platform defines

Updated rc.vtol_defaults to correct PWM_AUX behavior for VTOL airframes. Added PWM_AUX_RATE to rc.vtol_default and set parameters directly instead of environment variables.

This allows a simple-to-use bootloader update mechanism to switch from
fmu-v2 to fmu-v3 target that has more flash.

Added an imu heater driver, formatted whitespace, standardized comments, and added doxy documentation.

Edit the init.d-posix files to set MAV_TYPE script variables, and alphabetize lists in a few places.

Set parameters directly rather than script variables in VTOL airframe config files and alphabetize lists.

Starting with cmake version 3.12 the cmake -E copy_directory
command fails if the source directory does not exist. This results
in a build failure. This fix creates the source directory before
the copy which does not harm if the source directory exists.

Closes: #10368

   On FW with a px4io bin file, but not a px4io do not error

   Use tune control and have all paths in rcS indicate tunes

such that fractions of a second are configurable

 * tested on SPI (px4fmu-v4pro)
 * WIP I2C support