floppy: fix use-after-free in module load failure path

floppy: fix use-after-free in module load failure path

Commit 488211844e0c ("floppy: switch to one queue per drive instead of
sharing a queue") introduced a use-after-free.  We do "put_disk()" on
the disk device _before_ we then clean up the queue associated with that
disk.

Move the put_disk() down to avoid dereferencing a free'd data structure.

Cc: Jens Axboe <[email protected]>
Cc: Vivek Goyal <[email protected]>
Reported-and-tested-by: Randy Dunlap <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>