dt-binding: usb: ci-hdrc-usb2: add imx7ulp compatible

Add imx7ulp and imx8qm compatible
Signed-off-by: Peter Chen <peter.chen@nxp.com>

Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt

@@ -10,6 +10,7 @@ Required properties:
 	"fsl,imx6sx-usb"
 	"fsl,imx6ul-usb"
 	"fsl,imx7d-usb"
+	"fsl,imx7ulp-usb"
 	"lsi,zevio-usb"
 	"qcom,ci-hdrc"
 	"chipidea,usb2"