arm64: dts: meson-axg-s400: enable USB OTG

This enables USB OTG on the S400 board.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-axg-s400.dts

@@ -584,3 +584,9 @@ &uart_AO {
 	pinctrl-0 = <&uart_ao_a_pins>;
 	pinctrl-names = "default";
 };
+
+&usb {
+	status = "okay";
+	dr_mode = "otg";
+	vbus-supply = <&usb_pwr>;
+};