esp32: fix some WiFi bugs

Fix following WiFi bugs:
1. Fix the bug that wpa2 enterprise sta can connect open AP
2. Fix TKIP/CCMP PN replay attack detection bug
3. Increase buffer number type from uint8_t to uint16_t to support more than 255 buffers
4. Avoid recalculating PMK if esp_wifi_set_config() is not called
5. Fix the bug that scan done leads to crash because of uint8 overflow
6. Fix 5.5M signal test bug

components/esp32/include/esp_wifi.h

@@ -543,7 +543,7 @@ esp_err_t esp_wifi_get_bandwidth(wifi_interface_t ifx, wifi_bandwidth_t *bw);
   * @brief     Set primary/secondary channel of ESP32
   *
   * @attention 1. This is a special API for sniffer
-  * @attention 2. This API should be called after esp_wifi_start() or esp_wifi_set_promiscuous()
+  * @attention 2. This API should be called after esp_wifi_start() and esp_wifi_set_promiscuous()
   *
   * @param     primary  for HT20, primary is the channel number, for HT40, primary is the primary channel
   * @param     second   for HT20, second is ignored, for HT40, second is the second channel