Fix #1355 - I2SO pin inversion ignored #806

Job	Run time
tests (ubuntu-latest, tests)	34s
build (ubuntu-latest, noradio)	1m 53s
tests (macos-latest, tests)	37s
build (ubuntu-latest, wifi)	2m 23s
tests (windows-latest, tests_nosan)	1m 8s
build (ubuntu-latest, bt)	2m 15s
build (macos-latest, noradio)	1m 31s
build (macos-latest, wifi)	1m 54s
build (macos-latest, bt)	1m 42s
build (windows-latest, noradio)	4m 39s
build (windows-latest, wifi)	5m 36s
build (windows-latest, bt)	5m 20s
	29m 32s

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