dt-bindings: usb: dwc3: Add SDX75 compatible

Document the SDX75 dwc3 compatible.

Signed-off-by: Rohit Agarwal <quic_rohiagar@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/1695359525-4548-5-git-send-email-quic_rohiagar@quicinc.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>