RDMA/hns: Add member assignments for qp_init_attr

Some kernel ULPs need to use the return value of qp_init_attr, so add
member assignments for qp_init_attr.

Fixes: 926a01dc ("RDMA/hns: Add QP operations support for hip08 SoC")
Link: https://lore.kernel.org/r/1624011020-16992-5-git-send-email-liweihang@huawei.com


Signed-off-by: Yangyang Li <liyangyang20@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>