wl0.1 Breaks wl1 on WRT610N

[reb00tz]

When virtual interface is created for wl0, MAC address for wl0.1 is actually the "base" address of wl1, which then "breaks" wl1 until wl0.1 is removed.

To replicate:

• do factory reset WRT610N (f/w: 08/23/09 std-nokaid-usb 12714M Eko)
• set up wl0 and wl1 (default bridged)
• client can connect to wl1
• telnet or SSH for console
• ifconfig shows wl0 and wl1 MACs (e.g. eth0=00:22:6B:7B:B2:A8 and eth1=00:22:6B:7B:B2:A9)
• create wl0.1 (default bridged)
• ifconfig shows wl0.1 MAC same as eth1 (e.g. eth1=wl0.1=00:22:6B:7B:B2:A9)
• client no longer connects to wl1

As an "extra", creating wl1.1 (i.e. virtual interface on 2nd radio) shows NO MAC address (i.e. "HWaddr 00:00:00:00:00:00") and no clients can connect to it either.