ARM: dts: Set up power domain for MFC and G-scaler for exynos5250

This patch adds device tree nodes for MFC and G-scaler power
domains of exynos5250.It binds these power-domain nodes to repsective
device tree nodes

It also adds support to enable PM generic domains for exynos5250.

Signed-off-by: Prasanna Kumar <prasanna.ps@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5250.dtsi

@@ -46,6 +46,16 @@
 		i2c8 = &i2c_8;
 	};
 
+	pd_gsc: gsc-power-domain@0x10044000 {
+		compatible = "samsung,exynos4210-pd";
+		reg = <0x10044000 0x20>;
+	};
+
+	pd_mfc: mfc-power-domain@0x10044040 {
+		compatible = "samsung,exynos4210-pd";
+		reg = <0x10044040 0x20>;
+	};
+
 	gic:interrupt-controller@10481000 {
 		compatible = "arm,cortex-a9-gic";
 		#interrupt-cells = <3>;
@@ -79,6 +89,7 @@
 		compatible = "samsung,mfc-v6";
 		reg = <0x11000000 0x10000>;
 		interrupts = <0 96 0>;
+		samsung,power-domain = <&pd_mfc>;
 	};
 
 	rtc {
@@ -604,28 +615,33 @@
 		};
 	};
 
+
 	gsc_0:  gsc@0x13e00000 {
 		compatible = "samsung,exynos5-gsc";
 		reg = <0x13e00000 0x1000>;
 		interrupts = <0 85 0>;
+		samsung,power-domain = <&pd_gsc>;
 	};
 
 	gsc_1:  gsc@0x13e10000 {
 		compatible = "samsung,exynos5-gsc";
 		reg = <0x13e10000 0x1000>;
 		interrupts = <0 86 0>;
+		samsung,power-domain = <&pd_gsc>;
 	};
 
 	gsc_2:  gsc@0x13e20000 {
 		compatible = "samsung,exynos5-gsc";
 		reg = <0x13e20000 0x1000>;
 		interrupts = <0 87 0>;
+		samsung,power-domain = <&pd_gsc>;
 	};
 
 	gsc_3:  gsc@0x13e30000 {
 		compatible = "samsung,exynos5-gsc";
 		reg = <0x13e30000 0x1000>;
 		interrupts = <0 88 0>;
+		samsung,power-domain = <&pd_gsc>;
 	};
 
 	hdmi {

arch/arm/mach-exynos/Kconfig

@@ -61,6 +61,7 @@ config SOC_EXYNOS5250
 	bool "SAMSUNG EXYNOS5250"
 	default y
 	depends on ARCH_EXYNOS5
+	select PM_GENERIC_DOMAINS if PM
 	select S5P_PM if PM
 	select S5P_SLEEP if PM
 	select S5P_DEV_MFC