This patch fixes (out-of-bounds access) coverity issue.
Coverity issue: 349932
Fixes: 7d7f9f80bbfb ("net/hns3: support MAC address related operations")
Cc: stable@dpdk.org
Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Reviewed-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>