arm64: dts: allwinner: h5: NanoPi NEO Plus2 : add EMAC support

add arm64 H5 dwmac-sun8i support for this board
Signed-off-by: Antony Antony <antony@phenome.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo-plus2.dts

@@ -53,6 +53,7 @@ / {
 	compatible = "friendlyarm,nanopi-neo-plus2", "allwinner,sun50i-h5";
 
 	aliases {
+		ethernet0 = &emac;
 		serial0 = &uart0;
 	};
 
@@ -133,6 +134,22 @@ &ehci3 {
 	status = "okay";
 };
 
+&emac {
+	pinctrl-names = "default";
+	pinctrl-0 = <&emac_rgmii_pins>;
+	phy-supply = <&reg_gmac_3v3>;
+	phy-handle = <&ext_rgmii_phy>;
+	phy-mode = "rgmii";
+	status = "okay";
+};
+
+&external_mdio {
+	ext_rgmii_phy: ethernet-phy@7 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <7>;
+	};
+};
+
 &mmc0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&mmc0_pins_a>;