net/hns3: add Tx short frame padding compatibility

net/hns3: add Tx short frame padding compatibility

There are difference about padding ultra-short frame in Tx procession
for different versions of hardware network engine.

If packet length is less than minimum packet length supported by
hardware in Tx direction, driver need to pad it to avoid error. The
minimum packet length in Tx direction is 33 based on kunpeng 920, and 9
based on kunpeng 930.

Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>