RDMA/hns: Remove redundant DFX file and DFX ops structure

RDMA/hns: Remove redundant DFX file and DFX ops structure

[ Upstream commit 40b4b79c866ffc1414a3989cc480263e76f28589 ]

There is no need to use a dedicated DXF file and DFX structure to manage
the interface of the query queue context.

Link: https://lore.kernel.org/r/20220822104455.2311053-2-liangwenpeng@huawei.com
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Stable-dep-of: 487d65090a3d ("RDMA/hns: Fix the gid problem caused by free mr")
Signed-off-by: Sasha Levin <sashal@kernel.org>