liu zhifu 0b4e1ecdec esp_wifi: backport some WiFi bugs
1. Fix WiFi log print level

2. Optimize WiFi/BT coexist sleep
   - If any data tx/rx in WiFi slice, fore wakeup next TBTT
   - Increase active timeout time to coex TBTT interval to avoid sleep in WiFi slice

3. Fix esp_wifi_stop() crash
   esp_wifi_stop() crashes if it's called when WiFi is not initialized.

4. Fix esp_wifi_stop() leads to memory leak

5. esp_wifi_sta_get_ap_info() returns actual values of group ciphers
2020-04-10 11:18:44 +08:00
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