ARM: dts: s700: add MMC/SD controller node

This patch adds node for mmc/sd controller found on Action Semi OWL
S700 SoC.

Since, upstream Linux binding has not been merged for S700 MMC/SD
controller, Changes are put in u-boot specific dtsi file.

Signed-off-by: Amit Singh Tomar <amittomer25@gmail.com>
diff --git a/arch/arm/dts/s700-u-boot.dtsi b/arch/arm/dts/s700-u-boot.dtsi
index 1b27682..3c3396b 100644
--- a/arch/arm/dts/s700-u-boot.dtsi
+++ b/arch/arm/dts/s700-u-boot.dtsi
@@ -19,6 +19,16 @@
 			status = "okay";
                 };
 
+		mmc0: mmc@e0210000 {
+			compatible = "actions,s700-mmc", "actions,owl-mmc";
+			reg = <0x0 0xe0210000 0x0 0x4000>;
+			interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cmu CLK_SD0>;
+			dmas = <&dma 2>;
+			dma-names = "mmc";
+			bus-width = <4>;
+			status = "okay";
+		};
 	};
 };