ARM: dts: replace number by macro in clock binding for exynos4

This patch replaces magic number of MIPI DSI Master node with
macros in clock binding for exynos4
Signed-off-by: Beomho Seo <beomho.seo@samsung.com>
Reviewed-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos4.dtsi

@@ -135,7 +135,7 @@ dsi_0: dsi@11C80000 {
 		samsung,power-domain = <&pd_lcd0>;
 		phys = <&mipi_phy 1>;
 		phy-names = "dsim";
-		clocks = <&clock 286>, <&clock 143>;
+		clocks = <&clock CLK_DSIM0>, <&clock CLK_SCLK_MIPI0>;
 		clock-names = "bus_clk", "pll_clk";
 		status = "disabled";
 		#address-cells = <1>;