arm64: dts: allwinner: h6: add USB Vbus regulator for Pine H64

The 5V output of the USB ports on Pine H64 is controlled via a GPIO.

Add the USB Vbus regulator device tree node.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts

@@ -51,6 +51,16 @@ status {
 			gpios = <&r_pio 0 7 GPIO_ACTIVE_HIGH>; /* PL7 */
 		};
 	};
+
+	reg_usb_vbus: vbus {
+		compatible = "regulator-fixed";
+		regulator-name = "usb-vbus";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		startup-delay-us = <100000>;
+		gpio = <&r_pio 0 5 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
 };
 
 &emac {