arm64: dts: imx8mq-librem5: add usb-role-switch property to dwc3

In order to enable (PD and data) role switching on the Librem 5 phone,
add the usb-role-switch property to imx8mq's dwc3 node.
Signed-off-by: NAngus Ainslie <angus@akkea.ca>
Signed-off-by: NMartin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi

@@ -1302,6 +1302,7 @@
 	#size-cells = <0>;
 	dr_mode = "otg";
 	snps,dis_u3_susphy_quirk;
+	usb-role-switch;
 	status = "okay";
 
 	port@0 {