net/hns3: fix residual MAC address entry

net/hns3: fix residual MAC address entry

Currently, even if we fail to remove the origin MAC address from the HW,
the set_default_mac will go on, and add the new MAC address to the HW.
Eventually cause the original MAC address entry to remain in the HW, and
users may receive unexpected packets.

This patch make set_default_mac return directly to failure if deleting
the original MAC address fails, simplifying the behavior of the driver
and solving the problem of residual MAC address entry.

Fixes: 7d7f9f80bbfb ("net/hns3: support MAC address related operations")
Cc: stable@dpdk.org
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>