mmc: fix disk/queue leak in case of adding disk failure

In case of adding disk failure, the disk needs to be released, otherwise
disk/queue is leaked.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220718160851.312972-1-ming.lei@redhat.com


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