RDMA/hns: Fix the size setting error when copying CQE in clean_cq()

The size of CQE is different for different versions of hardware, so the
driver needs to specify the size of CQE explicitly.

Fixes: 09a5f210

 ("RDMA/hns: Add support for CQE in size of 64 Bytes")
Link: https://lore.kernel.org/r/20210927125557.15031-2-liangwenpeng@huawei.com
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>