Staging: comedi: add pcmmio and pcmuio drivers

Drivers for Winsystems PC-104 based multifunction IO board and 48
channel and 98 channel dio boards

From: Calin Culianu <calin@ajvar.org>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: David Schleef <ds@schleef.org>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>