Sub: fix several EK3_MAG_Fusion cases for Sub #39574

Job	Run time
build (stm32f7, chibios, 10)	4m 10s
build (stm32h7, chibios, 10)	3m 41s
build (fmuv2-plane, chibios, 10)	2m 24s
build (periph-build, chibios, 10)	3m 59s
build (iofirmware, chibios, 10)	1m 32s
build (CubeOrange-bootloader, chibios, 10)	52s
build (fmuv3-bootloader, chibios, 10)	51s
build (revo-bootloader, chibios, 10)	52s
build (stm32h7-debug, chibios, 10)	2m 33s
build (fmuv3, chibios, 10)	5m 47s
build (revo-mini, chibios, 10)	4m 46s
build (MatekF405-Wing, chibios, 10)	5m 22s
build (CubeOrange-ODID, chibios, 10)	3m 1s
build (CubeRedPrimary-bootloader, chibios, 10)	54s
build (configure-all, chibios, 10)	10m 43s
build (build-options-defaults-test, chibios, 10)	8m 15s
build (signing, chibios, 10)	2m 49s
build (CubeOrange-PPP, chibios, 10)	2m 7s
build (SOHW, chibios, 10)	3m 41s
build (Pixhawk6X-PPPGW, chibios, 10)	1m 12s
build (new-check, chibios, 10)	4m 40s
	1h 14m 11s

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