net: hns3: fix the VLAN of a vf cannot be added problem

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4MWFK


CVE: NA

----------------------------

Use 'ip link set ethx vf x vlan xx' to add a vlan to a vf, but
can not see the vlan info from 'ip link show ethx'. Because the
vlan config code had been revert by mistake.

Fixes: 79549957 ("Revert: net: hns3: adds support for extended VLAN mode and 'QOS' in vlan 802.1Q protocol.")
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Reviewed-by: li yongxin <liyongxin1@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>