USB: New device PID for ftdi_sio driver

Hello,

I need to use MaxStream's PKG-U modules which includes a ftdi sio chipset for
usb2serial communication, here are the patches for handling Maxstream's modules.

The VID & PID to use with the open-source driver are provided on the CD-ROM
bundled with the modules.

From: Neil Superna ARMSTRONG <superna@na-prod.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>