ROMFS split rc.board into defaults, sensors, and extras

ROMFS/CMakeLists.txt

ROMFS/px4fmu_common/init.d/airframes/4900_crazyflie

ROMFS/px4fmu_common/init.d/rcS

boards/airmind/mindpx-v2/init/rc.board

boards/airmind/mindpx-v2/init/rc.board_defaults

boards/airmind/mindpx-v2/init/rc.board_sensors

boards/atmel/same70xplained/init/rc.board_sensors

boards/auav/x21/init/rc.board_sensors

boards/auav/x21/init/rc.defaults

boards/av/x-v1/init/rc.board_defaults

boards/av/x-v1/init/rc.board_extras

boards/av/x-v1/init/rc.board_sensors

boards/bitcraze/crazyflie/init/rc.board_defaults

boards/bitcraze/crazyflie/init/rc.board_sensors

boards/gumstix/aerocore2/init/rc.board_defaults

boards/gumstix/aerocore2/init/rc.board_sensors

boards/intel/aerofc-v1/init/rc.board_defaults

boards/intel/aerofc-v1/init/rc.board_sensors

boards/nxp/fmuk66-v3/init/rc.board_defaults

boards/nxp/fmuk66-v3/init/rc.board_sensors