ARM: dts: Add pin state information for DP HPD support to Exynos5420

Add pin state information for DP HPD support that requires pin configuration
support using pinctrl interface.

Signed-off-by: Vikas Sajjan <vikas.sajjan@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/boot/dts/exynos5420-smdk5420.dts b/arch/arm/boot/dts/exynos5420-smdk5420.dts
index ce7bb64..bafba25 100644
--- a/arch/arm/boot/dts/exynos5420-smdk5420.dts
+++ b/arch/arm/boot/dts/exynos5420-smdk5420.dts
@@ -32,6 +32,8 @@
 	};
 
 	dp-controller@145B0000 {
+		pinctrl-names = "default";
+		pinctrl-0 = <&dp_hpd>;
 		samsung,color-space = <0>;
 		samsung,dynamic-range = <0>;
 		samsung,ycbcr-coeff = <0>;