ARM: dts: add device tree support for exynos5 hdmiddc

This patch adds support for device tree based discovery for exynos5
hdmi ddc.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

Documentation/devicetree/bindings/drm/exynos/hdmiddc.txt

@@ -0,0 +1,12 @@
+Device-Tree bindings for hdmiddc driver
+
+Required properties:
+- compatible: value should be "samsung,exynos5-hdmiddc".
+- reg: I2C address of the hdmiddc device.
+
+Example:
+
+	hdmiddc {
+		compatible = "samsung,exynos5-hdmiddc";
+		reg = <0x50>;
+	};

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

@@ -56,7 +56,15 @@
 	};
 
 	i2c@12C80000 {
-		status = "disabled";
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <66000>;
+		gpios = <&gpa0 6 3 3 0>,
+			<&gpa0 7 3 3 0>;
+
+		hdmiddc@50 {
+			compatible = "samsung,exynos5-hdmiddc";
+			reg = <0x50>;
+		};
 	};
 
 	i2c@12C90000 {

arch/arm/mach-exynos/mach-exynos5-dt.c

@@ -47,6 +47,8 @@ static const struct of_dev_auxdata exynos5250_auxdata_lookup[] __initconst = {
 				"s3c2440-i2c.0", NULL),
 	OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(1),
 				"s3c2440-i2c.1", NULL),
+	OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(2),
+				"s3c2440-i2c.2", NULL),
 	OF_DEV_AUXDATA("samsung,s3c2440-hdmiphy-i2c", EXYNOS5_PA_IIC(8),
 				"s3c2440-hdmiphy-i2c", NULL),
 	OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI0,