ARM64: meson: Sync DT with Linux 4.17.5

Synchronize the Linux Device Tree for Amlogic Meson GX boards from Linux 4.17.5
(Linux commit 54fb3c180d05e9dfda892a93413514e99f0cbb19).

This will enable HDMI_5V for USB Amlogic Meson GXL P212 based boards.
Signed-off-by: NLoic Devulder <ldevulder@suse.de>

arch/arm/dts/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>;
+};