ARM: dts: add device tree support for exynos5 hdmi

This patch adds support for device tree based discovery for exynos5
hdmi. Hdmi node is also renamed with "exynos5-hdmi".

Signed-off-by: Rahul Sharma <rahul.sharma@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 a352df4..2a478ab 100644
--- a/arch/arm/boot/dts/exynos5250-smdk5250.dts
+++ b/arch/arm/boot/dts/exynos5250-smdk5250.dts
@@ -166,4 +166,8 @@
 	spi_2: spi@12d40000 {
 		status = "disabled";
 	};
+
+	hdmi {
+		hpd-gpio = <&gpx3 7 0xf 1 3>;
+	};
 };