ARM: tegra: Fix ethernet node names

The node name of Ethernet controller should be "ethernet" instead of
"asix" or "smsc" as required by Ethernet controller devicetree schema:

    Documentation/devicetree/bindings/net/ethernet-controller.yaml

This patch can potentially affect boot loaders patching against full
node path instead of using device aliases.
Signed-off-by: NOleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: NThierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra20-colibri.dtsi

@@ -691,7 +691,7 @@
 		#address-cells = <1>;
 		#size-cells = <0>;
 
-		asix@1 {
+		ethernet@1 {
 			compatible = "usbb95,772b";
 			reg = <1>;
 			local-mac-address = [00 00 00 00 00 00];

arch/arm/boot/dts/tegra30-colibri.dtsi

@@ -960,7 +960,7 @@
 		#address-cells = <1>;
 		#size-cells = <0>;
 
-		asix@1 {
+		ethernet@1 {
 			compatible = "usbb95,772b";
 			reg = <1>;
 			local-mac-address = [00 00 00 00 00 00];

arch/arm/boot/dts/tegra30-ouya.dts

@@ -4553,7 +4553,7 @@
 		#address-cells = <1>;
 		#size-cells = <0>;
 
-		smsc@2 { /* SMSC 10/100T Ethernet Controller */
+		ethernet@2 { /* SMSC 10/100T Ethernet Controller */
 			compatible = "usb424,9e00";
 			reg = <2>;
 			local-mac-address = [00 11 22 33 44 55];