dt-bindings: usb: gpio-sbu-mux: Add an entry for FSUSB42

dt-bindings: usb: gpio-sbu-mux: Add an entry for FSUSB42

Add a compatible entry for the onsemi FSUSB42 USB switch, which can be used
for switching orientation of the SBU lines in USB Type-C applications.

Drivers work as-is with the existing fallback compatible.

Link to datasheet: https://www.onsemi.com/pdf/datasheet/fsusb42-d.pdf

Signed-off-by: Stephan Gerhold <stephan.gerhold@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20241212-x1e80100-qcp-dp-v1-1-37cb362a0dfe@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>