RDMA/hns: Fix error code of CMD

mainline inclusion
from mainline-v6.2-rc1
commit 667d6164
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6RO6S
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=667d6164b84884c64de3fc18670cd5a98b0b10cf

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The error code is fixed to EIO when CMD fails to excute. This patch
converts the error status reported by firmware to linux errno.

Fixes: a04ff739 ("RDMA/hns: Add command queue support for hip08 RoCE driver")
Link: https://lore.kernel.org/r/20221126102911.2921820-6-xuhaoyue1@hisilicon.com


Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Haoyue Xu <xuhaoyue1@hisilicon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Zhou Juan <nnuzj07170227@163.com>