ath79: add USB power control for GL-AR300M series

Add USB power control in DTS for GL.iNet models:
- AR300M;
- AR300M-Ext;
- AR300M16;
- AR300M16-Ext.

Signed-off-by: PtilopsisLeucotis <PtilopsisLeucotis@yandex.com>

target/linux/ath79/dts/qca9531_glinet_gl-ar300m-lite.dts

@@ -7,6 +7,8 @@
 	model = "GL.iNet GL-AR300M-Lite";
 };
 
+/delete-node/ &reg_usb_vbus;
+
 /delete-node/ &nand_flash;
 
 &nor_firmware {
@@ -27,3 +29,7 @@
 &led_wlan {
 	label = "green:wlan";
 };
+
+&usb0 {
+	/delete-property/ vbus-supply;
+};

target/linux/ath79/dts/qca9531_glinet_gl-ar300m.dtsi

@@ -37,6 +37,16 @@
 		};
 	};
 
+	reg_usb_vbus: reg_usb_vbus {
+		compatible = "regulator-fixed";
+
+		regulator-name = "usb_vbus";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpio 2 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 
@@ -134,6 +144,7 @@
 &usb0 {
 	#address-cells = <1>;
 	#size-cells = <0>;
+	vbus-supply = <&reg_usb_vbus>;
 	status = "okay";
 };