Merge branch 'bugfix/merge_some_wifi_bugs_into_release2.0' into 'release/v2.0'

esp32: update wifi lib for some fixes

1. Fix AMSDU flags issue
2. Fix smartconfig cause serial no response issue
3. Fix restore cause exception issue
4. smartconfig cause crash

See merge request !611
This commit is contained in:
Liu Zhi Fu
2017-03-27 15:01:21 +08:00