tcpip_adapter: Fix bug which prevents setting a static IP address for Ethernet interface

Merges https://github.com/espressif/esp-idf/pull/657

components/tcpip_adapter/tcpip_adapter_lwip.c

@@ -849,7 +849,6 @@ esp_err_t tcpip_adapter_dhcpc_start(tcpip_adapter_if_t tcpip_if)
 {
     TCPIP_ADAPTER_IPC_CALL(tcpip_if, 0, 0, 0, tcpip_adapter_dhcpc_start_api);
 
-    /* only support sta now, need to support ethernet */
     if ((tcpip_if != TCPIP_ADAPTER_IF_STA && tcpip_if != TCPIP_ADAPTER_IF_ETH)  || tcpip_if >= TCPIP_ADAPTER_IF_MAX) {
         ESP_LOGD(TAG, "dhcp client invalid if=%d", tcpip_if);
         return ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS;
@@ -903,8 +902,7 @@ esp_err_t tcpip_adapter_dhcpc_stop(tcpip_adapter_if_t tcpip_if)
 {
     TCPIP_ADAPTER_IPC_CALL(tcpip_if, 0, 0, 0, tcpip_adapter_dhcpc_stop_api);
 
-    /* only support sta now, need to support ethernet */
-    if (tcpip_if != TCPIP_ADAPTER_IF_STA || tcpip_if >= TCPIP_ADAPTER_IF_MAX) {
+    if ((tcpip_if != TCPIP_ADAPTER_IF_STA && tcpip_if != TCPIP_ADAPTER_IF_ETH)  || tcpip_if >= TCPIP_ADAPTER_IF_MAX) {
         ESP_LOGD(TAG, "dhcp client invalid if=%d", tcpip_if);
         return ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS;
     }