RDMA/hns: Add clear_hem return value to log

[ Upstream commit a519a612 ]

Log return value of clear_hem() to help diagnose.

Link: https://lore.kernel.org/r/20230523121641.3132102-4-huangjunxian6@hisilicon.com


Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Stable-dep-of: d81fb651 ("RDMA/hns: Use dev_* printings in hem code instead of ibdev_*")
Signed-off-by: Sasha Levin <sashal@kernel.org>