staging: comedi: c6xdigio: board does not use interrupts

This driver does not use interruptes. Don't bother parsing the
configuration option from "comedi_config".

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