Fix undefined reference to ble_svc_gap_device_name_set when GATT server is disabled (#349)

* Fix undefined reference to ble_svc_gap_device_name_set when GATT server is disabled

* Do not affect ESP-IDF <5.5.0

Author: iranl

src/NimBLEDevice.cpp

@@ -1290,12 +1290,13 @@ bool NimBLEDevice::injectConfirmPasskey(const NimBLEConnInfo& peerInfo, bool acc
  * @param [in] deviceName The name to set.
  */
 bool NimBLEDevice::setDeviceName(const std::string& deviceName) {
+#if !defined(ESP_IDF_VERSION) || ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(5, 5, 0) || CONFIG_BT_NIMBLE_GAP_SERVICE
     int rc = ble_svc_gap_device_name_set(deviceName.c_str());
     if (rc != 0) {
         NIMBLE_LOGE(LOG_TAG, "Device name not set - too long");
         return false;
     }
-
+#endif
     return true;
 } // setDeviceName