arm64: tegra: Enable sd card on P2571

Change-Id: I2320654ef9fc15dad901b516bd22379329e5ab88

arch/arm64/boot/dts/nvidia/tegra210-p2530.dtsi

@@ -402,6 +402,18 @@
 		enable-active-high;
 	};
 
+	vdd_3v3_sd: regulator-vdd-3v3-sd {
+		compatible = "regulator-fixed";
+		regulator-name = "VDD_3V3_SD";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio TEGRA_GPIO(Z, 4) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		vin-supply = <&vdd_3v3_sys>;
+
+		regulator-enable-ramp-delay = <472>;
+	};
+
 	vdd_gpu: regulator-vdd-gpu {
 		compatible = "pwm-regulator";
 		pwms = <&pwm 1 8000>;

arch/arm64/boot/dts/nvidia/tegra210-p2571.dts

@@ -1492,6 +1492,18 @@
 		};
 	};
 
+	/* MMC/SD */
+	mmc@700b0000 {
+		status = "okay";
+		bus-width = <4>;
+
+		cd-gpios = <&gpio TEGRA_GPIO(Z, 1) GPIO_ACTIVE_LOW>;
+		disable-wp;
+
+		vqmmc-supply = <&vddio_sdmmc>;
+		vmmc-supply = <&vdd_3v3_sd>;
+	};
+
 	usb@700d0000 {
 		status = "okay";
 		phys = <&micro_b>;