bridgevlan: avoid bash regex

bridgevlan

@@ -38,16 +38,20 @@ do
   for port in $i
   do
     if [ "$MODE" = "start" ] && [ -d /sys/class/net/$IFACE/brif/$port ]; then
-      #we allow vlan to pass through attached interface
-      if [[ $port =~ ^(eth|bond|wlan)[0-9]{1,2}$ ]]
-      then
+      case "$port" in
+	*.[0-9]*)
+	    # do nothing
+	;;
+	*)
+          # we allow vlan to pass through attached interface
           if [ -n "$IF_BRIDGE_VIDS" ]
 	  then
             bridge vlan add dev $port vid $IF_BRIDGE_VIDS
 	  else
             bridge vlan add dev $port vid 2-4094
           fi
-      fi
+	;;
+      esac
     fi
   done
 done