[PATCH] USB: ftdi_sio: custom baud rate fix

ftdi_sio: I messed up the baud_base for custom baud rate support in
2.6.13.  The attached one-liner patch fixes it.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>