mpc85xx: correct TP-LINK TL-WDR4900 MAC addresses

This commit fixes TP-Link TL-WDR4900 v1 MAC address assignment.
Previously, the MAC addrss was read for the ethernet from the "config"
partition. However, the content of this partition is dependent on the
firmware which was previously installed on the device.

Switch the MAC address source to the U-Boot partition, where the MAC
address is always present at a fixed partition. The partition was
previously already used for the WiFi MAC-addresses.

Reviewed-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Signed-off-by: David Bauer <mail@david-bauer.net>
(cherry picked from commit 07e555d873)
Signed-off-by: David Bauer <mail@david-bauer.net>

target/linux/mpc85xx/base-files/etc/board.d/02_network

@@ -21,7 +21,7 @@ ocedo,panda)
 tplink,tl-wdr4900-v1)
 	ucidef_add_switch "switch0" \
 		"0@eth0" "2:lan:1" "3:lan:2" "4:lan:3" "5:lan:4" "1:wan"
-	ucidef_set_interface_macaddr "wan" "$(mtd_get_mac_binary config 332)"
+	ucidef_set_interface_macaddr "wan" "$(macaddr_add $(mtd_get_mac_binary u-boot 0x4fc00) 1)"
 	;;
 *)
 	ucidef_set_interfaces_lan_wan "eth0" "eth1"

target/linux/mpc85xx/files/arch/powerpc/boot/dts/tl-wdr4900-v1.dts

@@ -48,7 +48,7 @@
 					#address-cells = <1>;
 					#size-cells = <1>;
 
-					partition@0 {
+					uboot: partition@0 {
 						reg = <0x0 0x0050000>;
 						label = "u-boot";
 						read-only;
@@ -66,7 +66,7 @@
 						label = "firmware";
 					};
 
-					config: partition@fe0000 {
+					partition@fe0000 {
 						reg = <0x00fe0000 0x00010000>;
 						label = "config";
 						read-only;
@@ -118,7 +118,7 @@
 		enet0: ethernet@b0000 {
 			phy-handle = <&phy0>;
 			phy-connection-type = "rgmii-id";
-			mtd-mac-address = <&config 0x144>;
+			mtd-mac-address = <&uboot 0x4fc00>;
 		};
 
 		enet1: ethernet@b1000 {