ARM: dts: Add vmmc fixed voltage regulator for exynos4210-origen

This patch adds fixed voltage vmmc regulator to dts file of Origen
board.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos4210-origen.dts

@@ -32,17 +32,28 @@
 		bootargs ="root=/dev/ram0 rw ramdisk=8192 initrd=0x41000000,8M console=ttySAC2,115200 init=/linuxrc";
 	};
 
+	mmc_reg: voltage-regulator {
+	        compatible = "regulator-fixed";
+		regulator-name = "VMEM_VDD_2.8V";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		gpio = <&gpx1 1 0>;
+		enable-active-high;
+	};
+
 	sdhci@12530000 {
 		bus-width = <4>;
 		pinctrl-0 = <&sd2_clk &sd2_cmd &sd2_bus4 &sd2_cd>;
 		pinctrl-names = "default";
+		vmmc-supply = <&mmc_reg>;
 		status = "okay";
 	};
 
 	sdhci@12510000 {
 		bus-width = <4>;
 		pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus4 &sd0_cd>;
 		pinctrl-names = "default";
+		vmmc-supply = <&mmc_reg>;
 		status = "okay";
 	};