dt-bindings: usb: snps,dwc3: support i.MX8MQ

i.MX8MQ use Synopsys DesignWare USB3 Controller IP, so add the
compatible.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230203014526.1461386-1-peng.fan@oss.nxp.com


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