ipq40xx: add Linksys MR8300 WAN port

This makes the WAN interface and port appear in
LuCi -> Network -> Switch on Linksys MR8300.
This allows to configure a VLAN on WAN.

Fixes: FS#4227

Signed-off-by: Julien Cassette <julien.cassette@gmail.com>

target/linux/ipq40xx/base-files/etc/board.d/02_network

@@ -67,12 +67,16 @@ ipq40xx_setup_interfaces()
 		;;
 	avm,fritzbox-4040|\
 	linksys,ea6350v3|\
-	linksys,ea8300|\
-	linksys,mr8300)
+	linksys,ea8300)
 		ucidef_set_interfaces_lan_wan "eth0" "eth1"
 		ucidef_add_switch "switch0" \
 			"0u@eth0" "1:lan" "2:lan" "3:lan" "4:lan"
 		;;
+	linksys,mr8300)
+		ucidef_set_interfaces_lan_wan "eth0" "eth1"
+		ucidef_add_switch "switch0" \
+			"0u@eth0" "1:lan" "2:lan" "3:lan" "4:lan" "0u@eth1" "5:wan"
+		;;
 	avm,fritzbox-7530)
 		ucidef_add_switch "switch0" \
 			"0u@eth0" "1:lan:4" "2:lan:3" "3:lan:2" "4:lan:1"