ramips: Fix Hongdian H7920 v40 mac address

After extracting the EEPROMs of different devices, only the 0x4 address is unique.

Use the 0x4 address as the LAN address, and the LAN+1 address as the WAN address.

Signed-off-by: Coia Prant <coiaprant@gmail.com>
Link: openwrt/openwrt#20256
(cherry picked from commit c907c7c)
Link: openwrt/openwrt#20257
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

Author: rbqvq

target/linux/ramips/dts/mt7628an_hongdian_h7920-v40.dts

@@ -123,8 +123,8 @@
 						reg = <0x0 0x400>;
 					};
 
-					macaddr_factory_28: macaddr@28 {
-						reg = <0x28 0x6>;
+					macaddr_factory_4: macaddr@4 {
+						reg = <0x4 0x6>;
 					};
 				};
 			};
@@ -146,7 +146,7 @@
 };
 
 &ethernet {
-	nvmem-cells = <&macaddr_factory_28>;
+	nvmem-cells = <&macaddr_factory_4>;
 	nvmem-cell-names = "mac-address";
 };
 

target/linux/ramips/mt76x8/base-files/etc/board.d/02_network

@@ -257,6 +257,7 @@ ramips_setup_macs()
 		label_mac=$(mtd_get_mac_binary factory 0x4)
 		;;
 	duzun,dm06|\
+	hongdian,h7920-v40|\
 	netgear,r6020|\
 	netgear,r6080|\
 	netgear,r6120|\
@@ -278,7 +279,6 @@ ramips_setup_macs()
 	totolink,a3)
 		wan_mac=$(mtd_get_mac_binary u-boot 0x1fc40)
 		;;
-	hongdian,h7920-v40|\
 	jotale,js76x8-8m|\
 	jotale,js76x8-16m|\
 	jotale,js76x8-32m|\