lantiq: ARV752DPW22: fix wireless mac address

The ARV752DPW22 has the same generic mac address in the EEPROM as it
was already noticed for other lantiq boards using a ralink wireless.

Use the base mac address from the boardconfig partition as it is done
by the stock firmware.

Signed-off-by: Mathias Kresin <dev@kresin.me>

target/linux/lantiq/dts/ARV752DPW22.dts

@@ -253,5 +253,6 @@
 		reg = <0x7000 0 0 0 0>;
 		ralink,mtd-eeprom = <&boardconfig 0x410>;
 		ralink,mtd-eeprom-swap;
+		mtd-mac-address = <&boardconfig 0x16>;
 	};
 };