ARM: dts: Add device tree node for DP controller for exynos5250

Add device tree node for DP controller in EXYNOS5250 and
enable the instance for the SMDK5250 board.
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5250-smdk5250.dts

@@ -231,4 +231,13 @@ sound {
 		samsung,i2s-controller = <&i2s0>;
 		samsung,audio-codec = <&wm8994>;
 	};
+
+	dp-controller {
+		samsung,color-space = <0>;
+		samsung,dynamic-range = <0>;
+		samsung,ycbcr-coeff = <0>;
+		samsung,color-depth = <1>;
+		samsung,link-rate = <0x0a>;
+		samsung,lane-count = <4>;
+	};
 };

arch/arm/boot/dts/exynos5250.dtsi

@@ -627,4 +627,18 @@ mixer {
 		reg = <0x14450000 0x10000>;
 		interrupts = <0 94 0>;
 	};
+
+	dp-controller {
+		compatible = "samsung,exynos5-dp";
+		reg = <0x145b0000 0x1000>;
+		interrupts = <10 3>;
+		interrupt-parent = <&combiner>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		dptx-phy {
+			reg = <0x10040720>;
+			samsung,enable-mask = <1>;
+		};
+	};
 };