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>
diff --git a/arch/arm/boot/dts/exynos5250-smdk5250.dts b/arch/arm/boot/dts/exynos5250-smdk5250.dts
index 1b8d410..907d404 100644
--- a/arch/arm/boot/dts/exynos5250-smdk5250.dts
+++ b/arch/arm/boot/dts/exynos5250-smdk5250.dts
@@ -231,4 +231,13 @@
 		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>;
+	};
 };