RDMA/hns: Modify the mask of QP number for CQE of hip08

The hip08 supports up to 1M QPs, so the qpn mask of cqe should be
modified.

Link: https://lore.kernel.org/r/1585194018-4381-4-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>