net/hns3: fix default MAC address from firmware

net/hns3: fix default MAC address from firmware

Currently, default MAC address obtained from firmware in PF driver is
directly used by .mac_addr_set ops implementation function when the
rte_eth_dev_start API function is executed. At this moment, if the
default MAC addr isn't an unicast address, it will fail to set default
MAC addr to hardware.

So this patch adds the validity check of default MAC addr in PF driver.
We will use a random unicast address, if the default MAC address
obtained from firmware is not a valid unicast address.

In addition, this patch also adjusts the location of processing default
MAC addr in VF driver so as to increase relevance and readability of the
code.

Fixes: eab21776717e ("net/hns3: support setting VF MAC address by PF driver")
Fixes: d51867db65c1 ("net/hns3: add initialization")
Cc: stable@dpdk.org
Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>