Simplify ethernet support for portenta based boards

Author: pennam

Diff for: src/Arduino_ConnectionHandler.h

@@ -46,21 +46,17 @@
 #if defined(ARDUINO_PORTENTA_H7_M7)
   #include <WiFi.h>
   #include <WiFiUdp.h>
+  #include <Ethernet.h>
+  #include <PortentaEthernet.h>
 
   #define BOARD_HAS_WIFI
+  #define BOARD_HAS_ETHERNET
   #define BOARD_HAS_PORTENTA_VISION_SHIELD_ETHERNET
   #define NETWORK_HARDWARE_ERROR WL_NO_SHIELD
   #define NETWORK_IDLE_STATUS WL_IDLE_STATUS
   #define NETWORK_CONNECTED WL_CONNECTED
 #endif
 
-#if defined(BOARD_HAS_PORTENTA_VISION_SHIELD_ETHERNET)
-  #include <Ethernet.h>
-  #include <PortentaEthernet.h>
-
-  #define BOARD_HAS_ETHERNET
-#endif
-
 #if defined(ARDUINO_NICLA_VISION)
   #include <WiFi.h>
   #include <WiFiUdp.h>