ARM: dts: add pmu syscon handle to exynos5250 hdmi

Add PMU syscon handle to HDMI dt node for controlling
PHY Enable/Disable bit.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5250.dtsi

@@ -731,6 +731,7 @@ hdmi {
 			 <&clock CLK_MOUT_HDMI>;
 		clock-names = "hdmi", "sclk_hdmi", "sclk_pixel",
 				"sclk_hdmiphy", "mout_hdmi";
+		samsung,syscon-phandle = <&pmu_system_controller>;
 	};
 
 	mixer {