lantiq: add default lan setup to board.d script

Signed-off-by: John Crispin <[email protected]>

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

@@ -145,6 +145,9 @@ VGV7510KW22)
 	ucidef_add_switch "switch0" \
 		"2:lan:1" "3:lan:2" "4:lan:3" "5:lan:4" "6t@eth0"
 	;;
+*)
+	ucidef_set_interface_lan 'eth0'
+	;;
 
 WBMR300)
 	lan_mac=$(mtd_get_mac_ascii ubootconfig ethaddr)