component/bt: bugfix for mismatch of controller mode in sdkconfig.defaults and source code in some examples

examples/bluetooth/a2dp_source/main/main.c

@@ -113,7 +113,7 @@ void app_main()
         return;
     }
 
-    if (esp_bt_controller_enable(ESP_BT_MODE_BTDM) != ESP_OK) {
+    if (esp_bt_controller_enable(ESP_BT_MODE_CLASSIC_BT) != ESP_OK) {
         ESP_LOGE(BT_AV_TAG, "%s enable controller failed\n", __func__);
         return;
     }

examples/bluetooth/ble_hid_device_demo/main/ble_hidd_demo_main.c

@@ -278,7 +278,7 @@ void app_main()
         return;
     }
 
-    ret = esp_bt_controller_enable(ESP_BT_MODE_BTDM);
+    ret = esp_bt_controller_enable(ESP_BT_MODE_BLE);
     if (ret) {
         ESP_LOGE(HID_DEMO_TAG, "%s enable controller failed\n", __func__);
         return;

examples/bluetooth/bt_discovery/main/bt_discovery.c

@@ -285,7 +285,7 @@ void app_main()
         return;
     }
 
-    if ((ret = esp_bt_controller_enable(ESP_BT_MODE_BTDM)) != ESP_OK) {
+    if ((ret = esp_bt_controller_enable(ESP_BT_MODE_CLASSIC_BT)) != ESP_OK) {
         ESP_LOGE(GAP_TAG, "%s enable controller failed: %s\n", __func__, esp_err_to_name(ret));
         return;
     }