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To prevent the system from abnormally sending PFC frames after an
abnormal reset. The hns3 driver notifies the firmware to disable pfc
before reset.

Fixes: 35d93a30

 ("net: hns3: adjust the process of PF reset")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Hao Lan <lanhao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>