arm64: tegra: Enable SDHCI controllers on P3110

The P3110 processor module wires one of the SDHCI controllers to an on-
board eMMC and exposes another set of SD/MMC signals on the connector to
support an external SD/MMC card. A third controller is connected to the
SDIO pins of an M.2 KEY E connector.
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra186-p3310.dtsi

@@ -7,6 +7,8 @@ / {
 	compatible = "nvidia,p3310", "nvidia,tegra186";
 
 	aliases {
+		sdhci0 = "/sdhci@3460000";
+		sdhci1 = "/sdhci@3400000";
 		serial0 = &uarta;
 		i2c0 = "/bpmp/i2c";
 		i2c1 = "/i2c@3160000";
@@ -72,6 +74,29 @@ i2c@31e0000 {
 		status = "okay";
 	};
 
+	/* SDMMC1 (SD/MMC) */
+	sdhci@3400000 {
+		cd-gpios = <&gpio TEGRA_MAIN_GPIO(P, 5) GPIO_ACTIVE_LOW>;
+		wp-gpios = <&gpio TEGRA_MAIN_GPIO(P, 4) GPIO_ACTIVE_LOW>;
+
+		vqmmc-supply = <&vddio_sdmmc1>;
+	};
+
+	/* SDMMC3 (SDIO) */
+	sdhci@3440000 {
+		status = "okay";
+	};
+
+	/* SDMMC4 (eMMC) */
+	sdhci@3460000 {
+		status = "okay";
+		bus-width = <8>;
+		non-removable;
+
+		vqmmc-supply = <&vdd_1v8_ap>;
+		vmmc-supply = <&vdd_3v3_sys>;
+	};
+
 	hsp@3c00000 {
 		status = "okay";
 	};