mediatek: bpi-r4: add ethernet aliases to DT

Adding the aliases also for Linux 6.6 was forgotten and is required for
U-Boot to hand down persistent MAC addresses to Linux.

Fixes: 5709254690 ("mediatek: bpi-r4: store random MAC addresses for the BPi-R4")
Signed-off-by: Daniel Golle <[email protected]>

target/linux/mediatek/files-6.6/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4.dtsi

@@ -17,11 +17,13 @@
 		     "mediatek,mt7988a";
 
 	aliases {
-		serial0 = &uart0;
+		ethernet0 = &gmac0;
+		ethernet1 = &gmac1;
 		led-boot = &led_green;
 		led-failsafe = &led_green;
 		led-running = &led_green;
 		led-upgrade = &led_green;
+		serial0 = &uart0;
 	};
 
 	chosen {