esp_netif/lwip: Fix deps cycles to "lwip -> esp_netif -> phy-drivers"

Fix dependency tree so that lwip doesn't depend on any specific network
interface component.
Network interface drivers shall depend on esp_netif.
esp_netif shall depend on lwip (but not on any specific interface
driver) -- it optionally depends on vfs and esp_eth (need ethernet
header for L2/bridge mode)

components/esp_netif/loopback/esp_netif_loopback.c

@@ -1,16 +1,8 @@
-// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+/*
+ * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include <string.h>
 
@@ -18,7 +10,6 @@
 
 #include "esp_netif.h"
 #include "esp_netif_private.h"
-#include "esp_netif_sta_list.h"
 
 #if CONFIG_ESP_NETIF_LOOPBACK
 
@@ -398,11 +389,6 @@ esp_err_t esp_netif_get_dns_info(esp_netif_t *esp_netif, esp_netif_dns_type_t ty
     return ESP_ERR_NOT_SUPPORTED;
 }
 
-esp_err_t esp_netif_get_sta_list(const wifi_sta_list_t *wifi_sta_list, esp_netif_sta_list_t *netif_sta_list)
-{
-    return ESP_ERR_NOT_SUPPORTED;
-}
-
 esp_err_t esp_netif_create_ip6_linklocal(esp_netif_t *esp_netif)
 {
     return ESP_ERR_NOT_SUPPORTED;