AP_Notify: Fix compilation error in GPIO_LED_1.cpp #41676

Job	Run time
build (stm32f7, chibios, 10)	6m 6s
build (stm32h7, chibios, 10)	5m 24s
build (fmuv2-plane, chibios, 10)	4m 0s
build (periph-build, chibios, 10)	5m 52s
build (iofirmware, chibios, 10)	3m 34s
build (CubeOrange-bootloader, chibios, 10)	2m 58s
build (fmuv3-bootloader, chibios, 10)	3m 1s
build (revo-bootloader, chibios, 10)	3m 2s
build (stm32h7-debug, chibios, 10)	4m 16s
build (fmuv3, chibios, 10)	7m 52s
build (revo-mini, chibios, 10)	6m 34s
build (MatekF405-Wing, chibios, 10)	6m 51s
build (CubeOrange-ODID, chibios, 10)	5m 6s
build (CubeRedPrimary-bootloader, chibios, 10)	3m 19s
build (configure-all, chibios, 10)	12m 44s
build (build-options-defaults-test, chibios, 10)	9m 27s
build (signing, chibios, 10)	4m 54s
build (CubeOrange-PPP, chibios, 10)	4m 27s
build (SOHW, chibios, 10)	5m 28s
build (Pixhawk6X-PPPGW, chibios, 10)	3m 21s
build (new-check, chibios, 10)	6m 31s
	1h 54m 47s

Provide feedback