floppy: cleanups: remove trailing whitespaces

Cleanup trailing whitespaces as checkpatch.pl suggests.

Signed-off-by: Denis Efremov <efremov@linux.com>
Link: https://lore.kernel.org/r/20210416083449.72700-2-efremov@linux.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>