md: stop using ->queuedata

Pointer to mddev is already available in private_data.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <songliubraving@fb.com>
This commit is contained in:
Christoph Hellwig 2020-05-08 18:15:14 +02:00 • committed by Song Liu
commit e4fc5a7429