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

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 <[email protected]>
Signed-off-by: Junxian Huang <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Leon Romanovsky <[email protected]>

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