ARM64: dts: meson-gxl-s905x-p212: Add phy-supply for usb0

Like LibreTech-CC, the USB0 needs the 5V regulator to be enabled to power the
devices on the P212 Reference Design based boards.

Fixes: b9f07cb4 ("ARM64: dts: meson-gxl-s905x-p212: enable the USB controller")
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Acked-by: NMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: NKevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-gxl-s905x-p212.dtsi

@@ -189,3 +189,10 @@
 &usb0 {
 	status = "okay";
 };
+
+&usb2_phy0 {
+	/*
+	 * HDMI_5V is also used as supply for the USB VBUS.
+	 */
+	phy-supply = <&hdmi_5v>;
+};