ARM: dts: Add vmmc-supply to MMC on arndale-octa board

LDO10 is directly connected to MMC controller. Register this
through vmmc-supply property.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5420-arndale-octa.dts

@@ -47,6 +47,7 @@ mmc@12200000 {
 		samsung,dw-mshc-ddr-timing = <0 2>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus4 &sd0_bus8>;
+		vmmc-supply = <&ldo10_reg>;
 
 		slot@0 {
 			reg = <0>;
@@ -63,6 +64,7 @@ mmc@12220000 {
 		samsung,dw-mshc-ddr-timing = <1 2>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&sd2_clk &sd2_cmd &sd2_cd &sd2_bus4>;
+		vmmc-supply = <&ldo10_reg>;
 
 		slot@0 {
 			reg = <0>;