ARM: dts: Remove unsused MFC clock from exynos4

Removes the unused sclk_mfc from exynos4 dtsi file.
Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos4.dtsi

@@ -248,8 +248,8 @@ mfc: codec@13400000 {
 		reg = <0x13400000 0x10000>;
 		interrupts = <0 94 0>;
 		samsung,power-domain = <&pd_mfc>;
-		clocks = <&clock 170>, <&clock 273>;
-		clock-names = "sclk_mfc", "mfc";
+		clocks = <&clock 273>;
+		clock-names = "mfc";
 		status = "disabled";
 	};