floppy: use blk_cleanup_disk()

Use the blk_cleanup_queue() followed by put_disk() can be
replaced with blk_cleanup_disk(). No need for two separate
loops.

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20210927220302.1073499-4-mcgrof@kernel.org


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