arm64: dts: mediatek: mt7988-bpi-r4: update 2g5 dts

Author: frank-w

arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-2g5.dts

@@ -3,3 +3,20 @@
 /dts-v1/;
 
 #include "mt7988a-bananapi-bpi-r4.dtsi"
+
+/ {
+	model = "Bananapi BPI-R4 2.5GE";
+};
+
+&gmac1 {
+	phy-mode = "internal";
+	phy-connection-type = "internal";
+	phy = <&int_2p5g_phy>;
+	status = "okay";
+	openwrt,netdev-name = "lan4";
+};
+
+&int_2p5g_phy {
+	pinctrl-names = "i2p5gbe-led";
+	pinctrl-0 = <&i2p5gbe_led0_pins>;
+};