lantiq: wifi mac fix for ARV752DPW

Set wifi mac from flash partition 'board_config' to
match the label on the device (Easybox 802).

Currently the wifi mac is always set to 00:0c:43:28:60:00.
eth0 and WiFi will now share the same mac (as in original firmware).

Signed-off-by: Lars Wessels <software@bytebox.org>
[improve commit message]
Signed-off-by: David Bauer <mail@david-bauer.net>

target/linux/lantiq/files-4.19/arch/mips/boot/dts/lantiq/danube_arcadyan_arv752dpw.dts

@@ -21,6 +21,8 @@
 		led-dsl = &internet_red;
 		led-usb = &umts;
 		led-wifi = &wifi;
+
+		label-mac-device = &wifi0;
 	};
 
 	memory@0 {
@@ -217,9 +219,10 @@
 	interrupt-map = <0x7000 0 0 1 &icu0 135>;
 	req-mask = <0x3>;
 
-	wifi@1814,0601 {
+	wifi0: wifi@1814,0601 {
 		compatible = "pci1814,0601";
 		reg = <0x7000 0 0 0 0>;
+		mtd-mac-address = <&boardconfig 0x16>;
 		ralink,mtd-eeprom = <&boardconfig 0x410>;
 		ralink,mtd-eeprom-swap;
 	};

target/linux/lantiq/files-5.4/arch/mips/boot/dts/lantiq/danube_arcadyan_arv752dpw.dts

@@ -21,6 +21,8 @@
 		led-dsl = &internet_red;
 		led-usb = &umts;
 		led-wifi = &wifi;
+
+		label-mac-device = &wifi0;
 	};
 
 	memory@0 {
@@ -217,9 +219,10 @@
 	interrupt-map = <0x7000 0 0 1 &icu0 135>;
 	req-mask = <0x3>;
 
-	wifi@1814,0601 {
+	wifi0: wifi@1814,0601 {
 		compatible = "pci1814,0601";
 		reg = <0x7000 0 0 0 0>;
+		mtd-mac-address = <&boardconfig 0x16>;
 		ralink,mtd-eeprom = <&boardconfig 0x410>;
 		ralink,mtd-eeprom-swap;
 	};