RDMA/erdma: Add the query_qp command to the cmdq

Certian QP attributes, such as sq_draining, can only be obtained
by querying the hardware on the erdma RoCEv2 device. To address this,
we add the query_qp command to the cmdq and parse the response to
retrieve corresponding QP attributes.

Signed-off-by: Boshi Yu <boshiyu@linux.alibaba.com>
Link: https://patch.msgid.link/20241211020930.68833-8-boshiyu@linux.alibaba.com


Reviewed-by: Cheng Xu <chengyou@linux.alibaba.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>