staging: comedi: drivers: use comedi_dio_insn_config() for simple cases

Convert the drivers with simple, per channel programmable i/o, to use the
comedi_dio_insn_config() helper function.

All of these pass a 'mask' of '0' to comedi_dio_insn_config() this causes
the per channel mask to be used to configure the i/o direction.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>