staging: comedi: gsc_hpdi: tidy up the boardinfo

Remove the unnecessary comments in the boardinfo definition and
tidy up the declaration.

FWIW, I'm not sure this boardinfo is really needed...

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>