ARM: sun6i: app4 evb1: Convert to DT label based syntax

In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun6i-a31-app4-evb1.dts

@@ -61,36 +61,34 @@ / {
 	chosen {
 		bootargs = "earlyprintk console=ttyS0,115200";
 	};
+};
 
-	soc@01c00000 {
-		pio: pinctrl@01c20800 {
-			usb1_vbus_pin_a: usb1_vbus_pin@0 {
-				allwinner,pins = "PH27";
-				allwinner,function = "gpio_out";
-				allwinner,drive = <SUN4I_PINCTRL_10_MA>;
-				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
-			};
-		};
+&ehci0 {
+	status = "okay";
+};
 
-		usbphy: phy@01c19400 {
-			usb1_vbus-supply = <&reg_usb1_vbus>;
-			status = "okay";
-		};
+&pio {
+	usb1_vbus_pin_a: usb1_vbus_pin@0 {
+		allwinner,pins = "PH27";
+		allwinner,function = "gpio_out";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+	};
+};
 
-		ehci0: usb@01c1a000 {
-			status = "okay";
-		};
+&reg_usb1_vbus {
+	pinctrl-0 = <&usb1_vbus_pin_a>;
+	gpio = <&pio 7 27 GPIO_ACTIVE_HIGH>;
+	status = "okay";
+};
 
-		uart0: serial@01c28000 {
-			pinctrl-names = "default";
-			pinctrl-0 = <&uart0_pins_a>;
-			status = "okay";
-		};
-	};
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pins_a>;
+	status = "okay";
+};
 
-	reg_usb1_vbus: usb1-vbus {
-		pinctrl-0 = <&usb1_vbus_pin_a>;
-		gpio = <&pio 7 27 GPIO_ACTIVE_HIGH>;
-		status = "okay";
-	};
+&usbphy {
+	usb1_vbus-supply = <&reg_usb1_vbus>;
+	status = "okay";
 };