ARM: dts: rename the clock of MIPI DSI 'pll_clk' to 'sclk_mipi'

The clock which was named as 'pll_clk' is actually not the clock source
of PLL in MIPI DSI. This patch fixes this disagreement.
Signed-off-by: NHyungwon Hwang <human.hwang@samsung.com>
Acked-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NInki Dae <inki.dae@samsung.com>

arch/arm/boot/dts/exynos4.dtsi

@@ -167,7 +167,7 @@
 		phys = <&mipi_phy 1>;
 		phy-names = "dsim";
 		clocks = <&clock CLK_DSIM0>, <&clock CLK_SCLK_MIPI0>;
-		clock-names = "bus_clk", "pll_clk";
+		clock-names = "bus_clk", "sclk_mipi";
 		status = "disabled";
 		#address-cells = <1>;
 		#size-cells = <0>;