Function esp_wifi_register_80211_tx_cb 

pub unsafe extern "C" fn esp_wifi_register_80211_tx_cb(
    cb: esp_wifi_80211_tx_done_cb_t,
) -> esp_err_t

@brief Register the TX callback function of 80211 tx data.

@attention This callback will be executed in WiFi task, so avoid doing any time consuming activity in the callback. Doing heavy work here can affect the WiFi performance.

@param cb callback function. If the cb is NULL, then unregister the tx cb.

@return

• ESP_OK: succeed
• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init