mediatek: fix label mac for Keenetic KN-(3711/3811/3911)

Keenetic devices always use the WAN port MAC address as
the MAC address printed on the label.

Signed-off-by: Maxim Anisimov <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/21635
Signed-off-by: Hauke Mehrtens <[email protected]>
(cherry picked from commit 5c195add76724d617aaa88024d6557a40d59c195)

target/linux/mediatek/dts/mt7981b-keenetic-kn-3711.dts

@@ -9,7 +9,7 @@
 	compatible = "keenetic,kn-3711", "mediatek,mt7981";
 
 	aliases {
-		label-mac-device = &gmac0;
+		label-mac-device = &gmac1;
 		led-boot = &power_led;
 		led-failsafe = &power_led;
 		led-running = &power_led;
@@ -117,7 +117,7 @@
 		};
 	};
 
-	mac@1 {
+	gmac1: mac@1 {
 		compatible = "mediatek,eth-mac";
 		reg = <1>;
 		phy-mode = "gmii";

target/linux/mediatek/dts/mt7981b-keenetic-kn-3811.dts

@@ -9,7 +9,7 @@
 	compatible = "keenetic,kn-3811", "mediatek,mt7981";
 
 	aliases {
-		label-mac-device = &gmac0;
+		label-mac-device = &gmac1;
 		led-boot = &power_led;
 		led-failsafe = &power_led;
 		led-running = &power_led;

target/linux/mediatek/dts/mt7981b-keenetic-kn-3911.dts

@@ -9,7 +9,7 @@
 	compatible = "keenetic,kn-3911", "mediatek,mt7981";
 
 	aliases {
-		label-mac-device = &gmac0;
+		label-mac-device = &gmac1;
 		led-boot = &status_led;
 		led-failsafe = &status_led;
 		led-running = &status_led;
@@ -94,7 +94,7 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&mdio_pins>;
 
-	gmac0: mac@0 {
+	mac@0 {
 		compatible = "mediatek,eth-mac";
 		reg = <0>;
 		phy-mode = "2500base-x";