net: hns3: fix keep alive can not resume problem when system busy

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5S7WZ


CVE: NA

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Currently, VF send keep alive to PF every 2s, and PF detect the
keep alive for 8s, some case, the work queue may schedule late,
cause keep alive lost, then the mac setting from PF may not
affect to the VF, and the keep alive can not resume, only reset
VF or reload VF driver can resume.

This patch adds keep alive resume mechanism, and adds some debug
print for this case.

When link status change between keep alive lost and resume, the
link status of VF may not the same as the PF, so adds push link
status to VF to avoid this case.

Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Reviewed-by: li yongxin <liyongxin1@huawei.com>
Signed-off-by: Laibin Qiu <qiulaibin@huawei.com>