arm64: dts: Add the arasan mmc DTS entries for APm X-Gene v2 SoC

This patch adds the arasan mmc nodes to reuse the of-arasan
driver for APM X-Gene v2 SoC platforms.
Signed-off-by: Duc Dang <dhdang@apm.com>

arch/arm64/boot/dts/apm/apm-merlin.dts

@@ -70,3 +70,7 @@ &sgenet0 {
 &xgenet1 {
 	status = "ok";
 };
+
+&mmc0 {
+	status = "ok";
+};

arch/arm64/boot/dts/apm/apm-shadowcat.dtsi

@@ -140,6 +140,40 @@ socplldiv2: socplldiv2  {
 				clock-output-names = "socplldiv2";
 			};
 
+			ahbclk: ahbclk@1f2ac000 {
+				compatible = "apm,xgene-device-clock";
+				#clock-cells = <1>;
+				clocks = <&socplldiv2 0>;
+				reg = <0x0 0x1f2ac000 0x0 0x1000
+					0x0 0x17000000 0x0 0x2000>;
+				reg-names = "csr-reg", "div-reg";
+				csr-offset = <0x0>;
+				csr-mask = <0x1>;
+				enable-offset = <0x8>;
+				enable-mask = <0x1>;
+				divider-offset = <0x164>;
+				divider-width = <0x5>;
+				divider-shift = <0x0>;
+				clock-output-names = "ahbclk";
+			};
+
+			sdioclk: sdioclk@1f2ac000 {
+				compatible = "apm,xgene-device-clock";
+				#clock-cells = <1>;
+				clocks = <&socplldiv2 0>;
+				reg = <0x0 0x1f2ac000 0x0 0x1000
+					0x0 0x17000000 0x0 0x2000>;
+				reg-names = "csr-reg", "div-reg";
+				csr-offset = <0x0>;
+				csr-mask = <0x2>;
+				enable-offset = <0x8>;
+				enable-mask = <0x2>;
+				divider-offset = <0x178>;
+				divider-width = <0x8>;
+				divider-shift = <0x0>;
+				clock-output-names = "sdioclk";
+			};
+
 			pcie0clk: pcie0clk@1f2bc000 {
 				compatible = "apm,xgene-device-clock";
 				#clock-cells = <1>;
@@ -224,6 +258,16 @@ sata3: sata@1a400000 {
 			dma-coherent;
 		};
 
+		mmc0: mmc@1c000000 {
+			compatible = "arasan,sdhci-4.9a";
+			reg = <0x0 0x1c000000 0x0 0x100>;
+			interrupts = <0x0 0x49 0x4>;
+			dma-coherent;
+			no-1-8-v;
+			clock-names = "clk_xin", "clk_ahb";
+			clocks = <&sdioclk 0>, <&ahbclk 0>;
+		};
+
 		sbgpio: sbgpio@17001000{
 			compatible = "apm,xgene-gpio-sb";
 			reg = <0x0 0x17001000 0x0 0x400>;