RDMA/hns: Simplify the status judgment code of hns_roce_v1_m_qp()

Use status table to reduce cyclomatic complexity.

Link: https://lore.kernel.org/r/1586938475-37049-7-git-send-email-liweihang@huawei.com


Signed-off-by: Lang Cheng <chenglang@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>