ARM: dts: rockchip: Add support for SD/MMC on MarsBoard-RK3066

This enables SDMMC0 on the board and gives a basic support for SD cards.
Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3066a-marsboard.dts

@@ -178,6 +178,14 @@ phy0: ethernet-phy@0 {
 	};
 };
 
+&mmc0 {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&sd0_clk>, <&sd0_cmd>, <&sd0_cd>, <&sd0_bus4>;
+	vmmc-supply = <&vcc_sd0>;
+};
+
 &pinctrl {
 	lan8720a {
 		phy_int: phy-int {