AP_HAL_ChibiOS: correct GPS output on MambaH743v4 #38219

Job	Run time
build (stm32f7, chibios, 10)	3m 47s
build (stm32h7, chibios, 10)	3m 33s
build (fmuv2-plane, chibios, 10)	1m 58s
build (periph-build, chibios, 10)	4m 6s
build (iofirmware, chibios, 10)	1m 26s
build (CubeOrange-bootloader, chibios, 10)	58s
build (fmuv3-bootloader, chibios, 10)	58s
build (revo-bootloader, chibios, 10)	59s
build (stm32h7-debug, chibios, 10)	2m 23s
build (fmuv3, chibios, 10)	5m 15s
build (revo-mini, chibios, 10)	4m 33s
build (MatekF405-Wing, chibios, 10)	4m 21s
build (CubeOrange-ODID, chibios, 10)	2m 39s
build (CubeRedPrimary-bootloader, chibios, 10)	54s
build (configure-all, chibios, 10)	9m 24s
build (build-options-defaults-test, chibios, 10)	7m 52s
build (signing, chibios, 10)	3m 6s
build (CubeOrange-PPP, chibios, 10)	2m 6s
build (SOHW, chibios, 10)	3m 33s
build (Pixhawk6X-PPPGW, chibios, 10)	1m 39s
	1h 5m 30s

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