WQE_INDEX and OPCODE and QPN of CQE use redundant masks. Just remove them.

Link: https://lore.kernel.org/r/1624262443-24528-7-git-send-email-liweihang@huawei.comSigned-off-by: NLang Cheng <chenglang@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>