dt-bindings: usb: usbmisc-imx: add i.MX8MM usbmisc

Add fsl,imx8mm-usbmisc compatible for i.MX8MM
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221223031012.92932-2-peng.fan@oss.nxp.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/usbmisc-imx.txt

@@ -8,6 +8,7 @@ Required properties:
 	"fsl,imx6sx-usbmisc" for imx6sx
 	"fsl,imx7d-usbmisc" for imx7d
 	"fsl,imx7ulp-usbmisc" for imx7ulp
+	"fsl,imx8mm-usbmisc" for imx8mm
 - reg: Should contain registers location and length
 
 Examples: