ARM64: dts: mediatek: enable ethernet on pumpkin boards

Add remaining properties to the ethernet node and enable it.
Signed-off-by: NBartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/arm64/boot/dts/mediatek/pumpkin-common.dtsi

@@ -167,6 +167,24 @@
 	status = "okay";
 };
 
+&ethernet {
+	pinctrl-names = "default";
+	pinctrl-0 = <&ethernet_pins_default>;
+	phy-handle = <&eth_phy>;
+	phy-mode = "rmii";
+	mac-address = [00 00 00 00 00 00];
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		eth_phy: ethernet-phy@0 {
+			reg = <0>;
+		};
+	};
+};
+
 &usb0 {
 	status = "okay";
 	dr_mode = "peripheral";