nvme-pci: fix DMA direction of unmapping integrity data

stable inclusion
from stable-v5.10.188
commit f4ff3798123585c9c7dd48ab7ef169fb505e0774
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7PZZC

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=f4ff3798123585c9c7dd48ab7ef169fb505e0774



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[ Upstream commit b8f6446b ]

DMA direction should be taken in dma_unmap_page() for unmapping integrity
data.

Fix this DMA direction, and reported in Guangwu's test.

Reported-by: Guangwu Zhang <guazhang@redhat.com>
Fixes: 4aedb705 ("nvme-pci: split metadata handling from nvme_map_data / nvme_unmap_data")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Yong Hu <yong.hu@windriver.com>