arm64: dts: hi3798cv200: add SD card support

It adds device mmc@9820000 which is used as SD card on poplar board.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

arch/arm64/boot/dts/hisilicon/hi3798cv200-poplar.dts

@@ -146,6 +146,12 @@ &ir {
 	status = "okay";
 };
 
+&sd0 {
+	bus-width = <4>;
+	cap-sd-highspeed;
+	status = "okay";
+};
+
 &spi0 {
 	status = "okay";
 	label = "LS-SPI0";

arch/arm64/boot/dts/hisilicon/hi3798cv200.dtsi

@@ -192,6 +192,18 @@ spi0: spi@8b1a000 {
 			status = "disabled";
 		};
 
+		sd0: mmc@9820000 {
+			compatible = "snps,dw-mshc";
+			reg = <0x9820000 0x10000>;
+			interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&crg HISTB_SDIO0_CIU_CLK>,
+				 <&crg HISTB_SDIO0_BIU_CLK>;
+			clock-names = "ciu", "biu";
+			resets = <&crg 0x9c 4>;
+			reset-names = "reset";
+			status = "disabled";
+		};
+
 		emmc: mmc@9830000 {
 			compatible = "snps,dw-mshc";
 			reg = <0x9830000 0x10000>;