Sub: correct comment on prev control mode #355

Job	Run time
build (stm32f7, chibios, 10)	7m 10s
build (stm32h7, chibios, 10)	6m 52s
build (fmuv2-plane, chibios, 10)	4m 0s
build (periph-build, chibios, 10)	5m 26s
build (iofirmware, chibios, 10)	3m 47s
build (CubeOrange-bootloader, chibios, 10)	2m 59s
build (fmuv3-bootloader, chibios, 10)	2m 57s
build (revo-bootloader, chibios, 10)	3m 2s
build (stm32h7-debug, chibios, 10)	4m 59s
build (fmuv3, chibios, 10)	9m 11s
build (revo-mini, chibios, 10)	7m 24s
build (MatekF405-Wing, chibios, 10)	7m 59s
build (CubeOrange-ODID, chibios, 10)	5m 15s
build (CubeRedPrimary-bootloader, chibios, 10)	3m 5s
build (configure-all, chibios, 10)	12m 49s
build (build-options-defaults-test, chibios, 10)	11m 41s
build (signing, chibios, 10)	5m 14s
build (CubeOrange-PPP, chibios, 10)	4m 40s
build (SOHW, chibios, 10)	6m 5s
build (Pixhawk6X-PPPGW, chibios, 10)	3m 36s
build (new-check, chibios, 10)	7m 41s
	2h 5m 52s

Provide feedback