ARM: dts: add device tree support for exynos5 mixer

This patch adds support for device tree based discovery for exynos5
mixer. Mixer node is also renamed with "exynos5-mixer".
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

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

+Device-Tree bindings for mixer driver
+
+Required properties:
+- compatible: value should be "samsung,exynos5-mixer".
+- reg: physical base address of the mixer and length of memory mapped
+	region.
+- interrupts: interrupt number to the cpu.
+
+Example:
+
+	mixer {
+		compatible = "samsung,exynos5-mixer";
+		reg = <0x14450000 0x10000>;
+		interrupts = <0 94 0>;
+	};

arch/arm/boot/dts/exynos5250.dtsi

@@ -526,4 +526,10 @@ hdmi {
 		reg = <0x14530000 0x100000>;
 		interrupts = <0 95 0>;
 	};
+
+	mixer {
+		compatible = "samsung,exynos5-mixer";
+		reg = <0x14450000 0x10000>;
+		interrupts = <0 94 0>;
+	};
 };

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

@@ -74,6 +74,8 @@ static const struct of_dev_auxdata exynos5250_auxdata_lookup[] __initconst = {
 				"exynos-gsc.3", NULL),
 	OF_DEV_AUXDATA("samsung,exynos5-hdmi", 0x14530000,
 				"exynos5-hdmi", NULL),
+	OF_DEV_AUXDATA("samsung,exynos5-mixer", 0x14450000,
+				"exynos5-mixer", NULL),
 	{},
 };