lantiq: fix ARV7519RW22 switch port indexing

Fixes FS#454.

Signed-off-by: Mathias Kresin <dev@kresin.me>

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

@@ -58,7 +58,7 @@ ARV7519PW)
 ARV7519RW22)
 	wan_mac=$(macaddr_add "$(mtd_get_mac_binary boardconfig 22)" 1)
 	ucidef_add_switch "switch0" \
-		"0:lan" "2:lan" "3:lan" "4:lan" "5:lan" "6t@eth0"
+		"0:lan:5" "2:lan:3" "3:lan:4" "4:lan:1" "5:lan:2" "6t@eth0"
 	;;
 
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