Staging: comedi: add unioxx5 driver

Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards

From: Kruchinin Daniil <asgard@etersoft.ru>
Cc: David Schleef <ds@schleef.org>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>