ARM: dts: Enabling dwc3-exynos driver for exynos5250

Adding DWC3 device tree node for Exynos5250 needed to
parse device tree data.
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5250.dtsi

@@ -479,7 +479,23 @@ i2s2: i2s@12D70000 {
 		pinctrl-0 = <&i2s2_bus>;
 	};
 
-	usbphy@12100000 {
+	usb@12000000 {
+		compatible = "samsung,exynos5250-dwusb3";
+		clocks = <&clock 286>;
+		clock-names = "usbdrd30";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		dwc3 {
+			compatible = "synopsys,dwc3";
+			reg = <0x12000000 0x10000>;
+			interrupts = <0 72 0>;
+			usb-phy = <&usb2_phy &usb3_phy>;
+		};
+	};
+
+	usb3_phy: usbphy@12100000 {
 		compatible = "samsung,exynos5250-usb3phy";
 		reg = <0x12100000 0x100>;
 		clocks = <&clock 1>, <&clock 286>;
@@ -511,7 +527,7 @@ usb@12120000 {
 		clock-names = "usbhost";
 	};
 
-	usbphy@12130000 {
+	usb2_phy: usbphy@12130000 {
 		compatible = "samsung,exynos5250-usb2phy";
 		reg = <0x12130000 0x100>;
 		clocks = <&clock 1>, <&clock 285>;