ARKV6X RC IN USART6 4.5 Backport #40905

Job	Run time
build (stm32f7, chibios, 10)	16m 15s
build (stm32h7, chibios, 10)	15m 3s
build (fmuv2-plane, chibios, 10)	8m 16s
build (periph-build, chibios, 10)	21m 25s
build (iofirmware, chibios, 10)	4m 29s
build (CubeOrange-bootloader, chibios, 10)	3m 32s
build (fmuv3-bootloader, chibios, 10)	3m 16s
build (revo-bootloader, chibios, 10)	3m 30s
build (stm32h7-debug, chibios, 10)	9m 42s
build (fmuv3, chibios, 10)	15m 33s
build (revo-mini, chibios, 10)	13m 0s
build (MatekF405-Wing, chibios, 10)	13m 10s
build (CubeOrange-ODID, chibios, 10)	10m 58s
build (CubeRedPrimary-bootloader, chibios, 10)	3m 37s
build (configure-all, chibios, 10)	11m 31s
build (build-options-defaults-test, chibios, 10)	22m 26s
build (signing, chibios, 10)	11m 37s
build (CubeOrange-PPP, chibios, 10)	9m 9s
build (CubeOrange-SOHW, chibios, 10)	9m 19s
build (Pixhawk6X-PPPGW, chibios, 10)	5m 20s
	3h 31m 8s

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