arm64: tegra: Add ethernet alias on Jetson TX1

Adding this alias for the Ethernet interface on Jetson TX1 allows the
bootloader to pass the MAC address to the Linux kernel.
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi

@@ -5,6 +5,10 @@ / {
 	model = "NVIDIA Tegra210 P2597 I/O board";
 	compatible = "nvidia,p2597", "nvidia,tegra210";
 
+	aliases {
+		ethernet = "/usb@70090000/ethernet@1";
+	};
+
 	host1x@50000000 {
 		dpaux@54040000 {
 			status = "okay";
@@ -1346,6 +1350,13 @@ usb@70090000 {
 		hvdd-usb-ss-pll-e-supply = <&vdd_1v8>;
 
 		status = "okay";
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ethernet@1 {
+			reg = <1>;
+		};
 	};
 
 	padctl@7009f000 {