arm64: dts: rockchip: enable dwc3 usb for A95X Z2

Enable dwc3 usb for A95X Z2.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20210209192350.7130-8-jbx6244@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3318-a95x-z2.dts

@@ -357,6 +357,11 @@ &usb20_otg {
 	status = "okay";
 };
 
+&usbdrd3 {
+	dr_mode = "host";
+	status = "okay";
+};
+
 &usb_host0_ehci {
 	status = "okay";
 };