Huawei driver code is terribly decayed and hard to maintain.
From this patch on, we'll try to progressively refactor total
Huawei driver, make the code more clear, reliable and maintainable.
This patch mainly optimized the huawei_conf.py file and the logic
that according to it.
Change-Id: I5da3e2a8b1bae4502ae4025a931e9c6899c81e56