arm64: dts: marvell: add eMMC support for Armada 37xx

Add the eMMC support for Armada 37xx SoC and enable it in the Armada 3720
DB board.
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm64/boot/dts/marvell/armada-3720-db.dts

@@ -146,6 +146,15 @@
 	status = "okay";
 };
 
+&sdhci0 {
+	non-removable;
+	bus-width = <8>;
+	mmc-ddr-1_8v;
+	mmc-hs400-1_8v;
+	marvell,pad-type = "fixed-1-8v";
+	status = "okay";
+};
+
 /* CON31 */
 &usb3 {
 	status = "okay";

arch/arm64/boot/dts/marvell/armada-37xx.dtsi

@@ -218,6 +218,17 @@
 				};
 			};
 
+			sdhci0: sdhci@d8000 {
+				compatible = "marvell,armada-3700-sdhci",
+				"marvell,sdhci-xenon";
+				reg = <0xd8000 0x300
+				       0x17808 0x4>;
+				interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&nb_periph_clk 0>;
+				clock-names = "core";
+				status = "disabled";
+			};
+
 			sata: sata@e0000 {
 				compatible = "marvell,armada-3700-ahci";
 				reg = <0xe0000 0x2000>;