cciss: update MAINTAINERS

Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Reviewed-by: Gerry Morong <gerry.morong@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Jens Axboe <axboe@fb.com>