mvebu: configure switch on WRT1200AC and WRT1900ACv2/S

Also collapses the three identical configurations into one block.

Signed-off-by: Claudio Leite <leitec@staticky.com>

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

@@ -11,14 +11,12 @@ board_config_update
 board=$(mvebu_board_name)
 
 case "$board" in
-armada-385-linksys-caiman)
-	ucidef_set_interfaces_lan_wan "eth1" "eth0"
-	;;
-armada-385-linksys-cobra)
-	ucidef_set_interfaces_lan_wan "eth1" "eth0"
-	;;
+armada-385-linksys-caiman|\
+armada-385-linksys-cobra|\
 armada-385-linksys-shelby)
 	ucidef_set_interfaces_lan_wan "eth1" "eth0"
+	ucidef_add_switch "switch0" \
+		"0:lan:4" "1:lan:3" "2:lan:2" "3:lan:1" "6@eth1" "4:wan" "5@eth0"
 	;;
 armada-xp-linksys-mamba)
 	ucidef_set_interfaces_lan_wan "eth0" "eth1"