ARM: dts: Use MSHC controller for eMMC memory for exynos4412-trats2

This patch removes device tree node of SDHCI0 controller and replaces
it with MSHC to enable support MMC 4.4 and improve performance of eMMC
memory.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos4412-trats2.dts

@@ -442,13 +442,25 @@ buck9_reg: buck9 {
 		};
 	};
 
-	sdhci@12510000 {
-		bus-width = <8>;
+	mmc@12550000 {
+		num-slots = <1>;
+		supports-highspeed;
+		broken-cd;
 		non-removable;
-		pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus8>;
-		pinctrl-names = "default";
+		card-detect-delay = <200>;
 		vmmc-supply = <&vemmc_reg>;
+		clock-frequency = <400000000>;
+		samsung,dw-mshc-ciu-div = <0>;
+		samsung,dw-mshc-sdr-timing = <2 3>;
+		samsung,dw-mshc-ddr-timing = <1 2>;
+		pinctrl-0 = <&sd4_clk &sd4_cmd &sd4_bus4 &sd4_bus8>;
+		pinctrl-names = "default";
 		status = "okay";
+
+		slot@0 {
+			reg = <0>;
+			bus-width = <8>;
+		};
 	};
 
 	serial@13800000 {