staging: comedi: adl_pci9111: tidy up multi-line comments

Reformat the multi-line comments in the kernel CodingStyle.

Remove the unnecessary CHANGELOG information, git provided this
better.

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>