exynos5: dts: Add device node for XHCI

Adding device node for xhci host controller to enable
usb 3.0 on exynos5250.

Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Cc: Julius Werner <jwerner@chromium.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Dan Murphy <dmurphy@ti.com>
Cc: Marek Vasut <marex@denx.de>

arch/arm/dts/exynos5250.dtsi

@@ -158,6 +158,18 @@
 		interrupts = <0 130 0>;
 	};
 
+	xhci@12000000 {
+		compatible = "samsung,exynos5250-xhci";
+		reg = <0x12000000 0x10000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		phy {
+			compatible = "samsung,exynos5250-usb3-phy";
+			reg = <0x12100000 0x100>;
+		};
+	};
+
 	ehci@12110000 {
 		compatible = "samsung,exynos-ehci";
 		reg = <0x12110000 0x100>;