net/hns3: fix adding multicast MAC address

net/hns3: fix adding multicast MAC address

Currently, when upper application calls the rte_eth_dev_mac_addr_add API
function to add a MC mac address based on hns3 PF/VF device, it will
fail.

In hns3 network engine adding UC and MC mac address with different
commands with firmware. We need to determine whether the input address
is a UC or a MC address to call different commands in the
'.mac_addr_add' and '.mac_addr_remove' ops implementation functions in
hns3 PF and VF driver as below:
  hns3_add_mac_addr
  hns3vf_add_uc_mac_addr
  hns3_remove_mac_addr
  hns3vf_remove_mac_addr

By the way, it is recommended calling the rte_eth_dev_set_mc_addr_list API
function to set the MC mac address, because using the
rte_eth_dev_mac_addr_add API function to set MC mac address may affect the
specifications of UC mac addresses.

Fixes: 7d7f9f80bbfb ("net/hns3: support MAC address related operations")
Cc: stable@dpdk.org
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>