block: move GENHD_FL_NATIVE_CAPACITY to disk->state

The flag to indicate an unlocked native capacity is dynamic state,
not a driver capability flag, so move it to disk->state.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211122130625.1136848-2-hch@lst.de


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