[PATCH] USB: ftdi_sio: new IDs for Westrex devices

This patch adds two new devices to the ftdi_sio driver's device ID
table.  The device IDs were supplied by Cory Lee to support two POS
printers made by Westrex International (Model 777 and Model 8900F).

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