arm64: tegra: Allow bootloader to configure Ethernet MAC on Jetson TX2

Add an ethernet alias so that a stable MAC address is added to the
device tree for the wired ethernet interface.
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

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

@@ -8,6 +8,7 @@ / {
 	compatible = "nvidia,p3310", "nvidia,tegra186";
 
 	aliases {
+		ethernet0 = "/ethernet@2490000";
 		sdhci0 = "/sdhci@3460000";
 		sdhci1 = "/sdhci@3400000";
 		serial0 = &uarta;