staging: comedi: daqboard2000: Use preferred comment style

Use the preferred block comment style for the copyright and driver
description header comments.

Signed-off-by: Arno Tiemersma <arno.tiemersma@gmail.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>