Staging: comedi: add aio_iiro_16 driver

Driver for Acces I/O Products PC-104 IIRO16 Relay And Isolated Input
Board

From: Zachary Ware <zach.ware@cctechnol.com>
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>