pd: fix order of cleaning up the queue and freeing the tagset

We must release the queue before freeing the tagset.

Fixes: 262d431f ("pd: use blk_mq_alloc_disk and blk_cleanup_disk")
Signed-off-by: Guoqing Jiang <jiangguoqing@kylinos.cn>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210706010734.1356066-1-guoqing.jiang@linux.dev


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