arm64: dts: imx8mm/n-evk: enable wakeup-source for usb phy

Enable usb phy to be wakeup source to support system wakeup
from usb.
Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi

@@ -399,6 +399,10 @@ &uart2 { /* console */
 	status = "okay";
 };
 
+&usbphynop1 {
+	wakeup-source;
+};
+
 &usbotg1 {
 	dr_mode = "otg";
 	hnp-disable;

arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi

@@ -255,6 +255,10 @@ &uart3 {
 	status = "okay";
 };
 
+&usbphynop1 {
+	wakeup-source;
+};
+
 &usbotg1 {
 	dr_mode = "otg";
 	hnp-disable;