net/hns3: fix rollback after setting PVID failure

net/hns3: fix rollback after setting PVID failure

Currently, three hardware operations are involved in setting the PVID.
If any operation fails, a failure will be returned. And there may be
residual hardware configurations because no rollback is performed.

This patch adds rollback operation for setting PVID to avoid residual
hardware configuration after the PVID fails to be configured.

Fixes: 411d23b9eafb ("net/hns3: support VLAN")
Cc: stable@dpdk.org
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>