Merge branch 'bugfix/tw27963_fix_wifi_stop_bug_v3.1' into 'release/v3.1'

esp32: fix WiFi stop bug in WiFi/BT coexist mode (backport v3.1)

See merge request idf/esp-idf!3981
This commit is contained in:
Jiang Jiang Jian
2018-12-18 11:40:42 +08:00