Staging: Comedi: addi-data: Clean up function comments

These comments look terrible and are full of redundant information.
Also reformat the license at the head of the file to wrap at 80 char.

Signed-off-by: Fred Akers <knivey@botops.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>