LwipIntfDev - config static IP auto gw,mask,dns as in Arduino libraries (#9040)

for 'modern' Ethernet libraries W5100lwIP, W5500lwIP and ENC28J60lwIP
used without EthernetCompat

libraries/lwIP_Ethernet/src/EthernetCompat.h

@@ -86,6 +86,13 @@ public:
         return ret;
     }
 
+    void end()
+    {
+        ip_addr_copy(LwipIntfDev<RawDev>::_netif.ip_addr,
+                     ip_addr_any);  // to allow DHCP at next begin
+        LwipIntfDev<RawDev>::end();
+    }
+
     HardwareStatus hardwareStatus() const
     {
         return _hardwareStatus;