Add support for RADIO_LINK_STATS #28880

Job	Run time
build (chibios, Durandal)	14m 6s
build (chibios, MatekF405)	11m 16s
build (chibios, KakuteF7)	11m 41s
build (chibios, MatekH743-bdshot)	13m 35s
build (chibios, Pixhawk1-1M)	12m 34s
build (chibios, MatekF405-CAN)	1m 57s
build (chibios, DrotekP3Pro)	1m 55s
build (chibios, Hitec-Airspeed)	3m 36s
build (chibios, f103-GPS)	3m 33s
build (disco, armhf)	11m 40s
	1h 25m 53s

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