arm64: tegra: Enable SDIO on Jetson Nano M.2 Key E

Enable SDMMC3 and set it up for SDIO devices.
Signed-off-by: Tamás Szűcs <tszucs@protonmail.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts

@@ -536,6 +536,19 @@ sdhci@700b0000 {
 		vmmc-supply = <&vdd_3v3_sd>;
 	};
 
+	sdhci@700b0400 {
+		status = "okay";
+		bus-width = <4>;
+
+		vqmmc-supply = <&vdd_1v8>;
+		vmmc-supply = <&vdd_3v3_sys>;
+
+		non-removable;
+		cap-sdio-irq;
+		keep-power-in-suspend;
+		wakeup-source;
+	};
+
 	clocks {
 		compatible = "simple-bus";
 		#address-cells = <1>;