net: hns3: handle empty unknown interrupt for VF

mainline inclusion
from mainline-net-5.17
commit 2f61353c
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4YXIM
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=2f61353cd2f789a4229b6f5c1c24a40a613357bb



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Since some interrupt states may be cleared by hardware, the driver
may receive an empty interrupt. Currently, the VF driver directly
disables the vector0 interrupt in this case. As a result, the VF
is unavailable. Therefore, the vector0 interrupt should be enabled
in this case.

Fixes: b90fcc5b ("net: hns3: add reset handling for VF when doing Core/Global/IMP reset")
Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>