USB: serial: FTDI with product code FB80 and vendor id 0403

USB: serial: FTDI with product code FB80 and vendor id 0403

It seems an USB device with vendor id 0403 and product code FB80 has an
FTDI serial io chip as well: http://ftdichip.com/Drivers/D2XX.htm
This device in fact is a true random generantor by comsci:
http://comscire.com/Products/R2000KU/
So the following patch should add support for this device if I am
correct. Not tested as I do not own this device (I would like support in
the kernel so that my entropybroker application (which distributes
entrop data (random values) between servers and clients)).

From: Folkert van Heusden <folkert@vanheusden.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>