ramips: fix not set lan/wan mac address

The first switch case is default case. Then it will only
match default case. cause not update the lan/wan mac address.
And in the default switch case the param lan_mac is empty.
it will case error message 'arithmetic syntax error' when
call macaddr_add function.

Signed-off-by: michael lee <igvtee@gmail.com>

SVN-Revision: 40910

target/linux/ramips/base-files/etc/uci-defaults/02_network

@@ -179,10 +179,6 @@ ramips_setup_macs()
 	local wan_mac=""
 
 	case $board in
-	*)
-		wan_mac=$(macaddr_add "$lan_mac" 1)
-		;;
-
 	br-6475nd)
 		lan_mac=$(mtd_get_mac_binary devdata 13)
 		wan_mac=$(mtd_get_mac_binary devdata 7)
@@ -240,6 +236,10 @@ ramips_setup_macs()
 		wan_mac=$(macaddr_add "$lan_mac" 1)
 		;;
 
+	*)
+		wan_mac=$(macaddr_add "$lan_mac" 1)
+		;;
+
 	esac
 
 	[ -n "$lan_mac" ] && ucidef_set_interface_macaddr lan $lan_mac