staging: comedi: me4000: update MODULE_DESCRIPTION

Change the MODULE_DESCRIPTION to something more useful than "Comedi low-
level driver"

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>