RDMA/hns: Fix Direct WQE is not enable

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4O23M



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The DWQE flag bit is added to fix the problem that the DWQE
function is not enabled.

Fixes: a7c87b3e ("RDMA/hns: Add support of direct wqe")
Signed-off-by: Guofeng Yue <yueguofeng@hisilicon.com>

Reviewed-by: Yangyang Li <liyangyang20@huawei.com>
Reviewed-by: Wenpeng Liang <liangwenpeng@huawei.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>