RDMA/hns: Add clear_hem return value to log

mainline inclusion
from mainline-v6.5-rc1
commit a519a612
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I7R61Q
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a519a612a71848b69b70b18b4d14d165b2d8aaf7

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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>
Signed-off-by: Juan Zhou <zhoujuan51@h-partners.com>