ARM: dts: exynos: Add Ethernet interface description for Odroid XU

Add Ethernet interface description for Odroid XU.

Add an alias to enable bootloaders to find the Ethernet interface
and assign a MAC address.

Signed-off-by: Łukasz Stelmach <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Krzysztof Kozlowski <[e-mail]>

arch/arm/boot/dts/exynos5410-odroidxu.dts

···
 	model = "Hardkernel Odroid XU";
 	compatible = "hardkernel,odroid-xu", "samsung,exynos5410", "samsung,exynos5";
 
+	aliases {
+		ethernet = &ethernet;
+	};
+
 	memory@40000000 {
 		device_type = "memory";
 		reg = <0x40000000 0x7ea00000>;
···
 &usbdrd3_1 {
 	vdd33-supply = <&ldo12_reg>;
 	vdd10-supply = <&ldo15_reg>;
+};
+
+&usbhost2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	ethernet: usbether@2 {
+		compatible = "usb0424,9730";
+		reg = <2>;
+		local-mac-address = [00 00 00 00 00 00]; /* Filled in by a bootloader */
+	};
 };