RDMA/hns: Fix incorrect clearing of interrupt status register

RDMA/hns: Fix incorrect clearing of interrupt status register

[ Upstream commit 2f9bfed18a0c5e66a082758e282d64d02b39a951 ]

The driver will clear all the interrupts in the same area
when the driver handles the interrupt of type AEQ overflow.
It should only set the interrupt status bit of type AEQ overflow.

Fixes: c55e5c868a98 ("RDMA/hns: Add eq support of hip08")
Link: https://lore.kernel.org/r/20220714134353.16700-4-liangwenpeng@huawei.com
Signed-off-by: Haoyue Xu <xuhaoyue1@hisilicon.com>
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>