USB: fix usb-serial device naming bug

Am Montag, 26. Februar 2007 15:16 schrieb Craig Schlenter:
> Hi Greg
> 
> 34ef50e5 is definitely
> the source of the problem. Reverting that makes the
> ftdi port show up as ttyUSB0 again for me and it
> can actually be opened.

This patch should fix the issue.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Craig Schlenter <craig@codefountain.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>