Added special UART4 init to sample if FlySky sticks are present or not.
Added boolean globalData.flyskygimbals to save the detection result.
Removed FLYSKY_HALL_STICKS and FLYSKY_HALL_STICKS_REVERSE CMake build options.
Tested on two RM TX16S radios, one with FlySky digital hall sticks and second with stock analog sticks.
* Flysky Hall Stick MOD using UART4 by disabling stick A/D.
* Fixed build error.
* Added Flysky hall stick mod in test targets.
* Changed ADC disable for Flysky hall sticks method.