Fix Wifi failed to connect on non PSRAM hardware with SPIRAM configuration (#2837)

***NO_CI***

Author: alberk8

targets/ESP32/_Network/NF_ESP32_Wireless.cpp

@@ -157,6 +157,17 @@ esp_err_t NF_ESP32_InitaliseWifi()
         // Initialise WiFi, allocate resource for WiFi driver, such as WiFi control structure,
         // RX/TX buffer, WiFi NVS structure etc, this WiFi also start WiFi task.
         wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
+
+#if CONFIG_SPIRAM_IGNORE_NOTFOUND
+        // The comment out function below is only avaliable in ESP IDF 5.1x
+        // if (!esp_psram_is_initialized()){
+        if (heap_caps_get_total_size(MALLOC_CAP_SPIRAM) == 0)
+        {
+            cfg.cache_tx_buf_num = 0;
+            cfg.feature_caps &= ~CONFIG_FEATURE_CACHE_TX_BUF_BIT;
+        }
+#endif
+
         ec = esp_wifi_init(&cfg);
 
         if (ec != ESP_OK)