Staging: comedi: remove comedi-specific wrappers

There are a number of comedi "wrappers" for some RT functions that are
about to go away.  This patch removes all of the wrapper calls within
the comedi drivers and core in order to prepare for removing the RT
comedi code.

Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>