ARM: dts: add dts node for the ahci sata exynos5440

This patch adds dts support for the sata controller
Signed-off-by: Girish K S <ks.giri@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5440.dtsi

@@ -215,4 +215,13 @@ rtc {
 		clocks = <&clock 21>;
 		clock-names = "rtc";
 	};
+
+	sata@210000 {
+		compatible = "snps,exynos5440-ahci";
+		reg = <0x210000 0x10000>;
+		interrupts = <0 30 0>;
+		clocks = <&clock 23>;
+		clock-names = "sata";
+	};
+
 };