cciss: memory leak in cciss_init_one()

commit 22bece00
(cciss: fix regression firmware not displayed in procfs)
added a small memory leak in cciss_init_one()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>