ramips: fix TP-Link Archer MAC address for ethernet

This fixes:
[    0.981884] OF: /ethernet@10100000: #nvmem-cell-cells = 1 found 0

Signed-off-by: Mieczyslaw Nalewaj <[email protected]>

target/linux/ramips/dts/mt7620a_tplink_archer.dtsi

@@ -118,7 +118,7 @@
 &ethernet {
 	pinctrl-names = "default";
 
-	nvmem-cells = <&macaddr_rom_f100>;
+	nvmem-cells = <&macaddr_rom_f100 0>;
 	nvmem-cell-names = "mac-address";
 
 	mediatek,portmap = "wllll";