cciss: Fix checkpatch TRAILING_WHITESPACE

Checkpatch emits 85 trailing whitespace warnings.

Remove trailing whitespace.
Signed-off-by: NTobin C. Harding <me@tobin.cc>
Acked-by: NDon Brace <don.brace@microsemi.com>
Signed-off-by: NJens Axboe <axboe@fb.com>