Revert "lantiq: Use correct macaddr generating logic for the DGN3500"

This reverts commit 492964e741f1e0254b6ed7c0a095551a31d25dc9, which
makes no sense. /etc/board.d cannot be used for system init stuff.

Signed-off-by: Felix Fietkau <[email protected]>

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

@@ -67,11 +67,6 @@ ARV4518PWR01*)
         ;;
 
 DGN3500*)
-	eth0_mac=$(mtd_get_mac_ascii uboot-env ethaddr)
-	nas0_mac=$(macaddr_add "$eth0_mac" 1)
-	ifconfig eth0 hw ether "$eth0_mac"
-	ifconfig wlan0 hw ether "$eth0_mac"
-	esi $(echo "$nas0_mac" | tr -d :)
 	ucidef_add_switch "switch0" \
 		"3:lan:1" "2:lan:2" "1:lan:3" "0:lan:4" "5t@eth0"
 	;;