RDMA/hns: Fix an AEQE overflow error caused by untimely update of eq_db_ci

RDMA/hns: Fix an AEQE overflow error caused by untimely update of eq_db_ci

[ Upstream commit 571e4ab8a45e530623ab129803f090a844dd3fe9 ]

eq_db_ci is updated only after all AEQEs are processed in the AEQ
interrupt handler, which is not timely enough and may result in
AEQ overflow. Two optimization methods are proposed:
1. Set an upper limit for AEQE processing.
2. Move time-consuming operations such as printings to the bottom
half of the interrupt.

cmd events and flush_cqe events are still fully processed in the top half
to ensure timely handling.

Fixes: a5073d6054f7 ("RDMA/hns: Add eq support of hip08")
Signed-off-by: wenglianfa <wenglianfa@huawei.com>
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Link: https://patch.msgid.link/20241024124000.2931869-2-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>