mediatek: fix Cudy AP3000 Outdoor label-mac

The label-mac does not match the one assigned to the ethernet interface.
Use the mac-address assigned to the wifi interface instead, as it
matches the one found on the device label.

Signed-off-by: David Bauer <[email protected]>

target/linux/mediatek/dts/mt7981b-cudy-ap3000outdoor-v1.dts

@@ -11,7 +11,7 @@
 	compatible = "cudy,ap3000outdoor-v1", "mediatek,mt7981-spim-snand-rfb";
 
 	aliases {
-		label-mac-device = &gmac1;
+		label-mac-device = &wifi;
 		led-boot = &led_status_green;
 		led-failsafe = &led_status_red;
 		led-running = &led_status_green;