Use more detailed define to enable ethernet support

  Otherwise we cannot distinguish between LoRa/Ethernet Vision Shield

Author: pennam

src/Arduino_ConnectionHandler.h

@@ -48,7 +48,7 @@
   #include <WiFiUdp.h>
 
   #define BOARD_HAS_WIFI
-  #define BOARD_HAS_PORTENTA_VISION_SHIELD
+  #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
@@ -107,7 +107,7 @@
   #define WIFI_FIRMWARE_VERSION_REQUIRED WIFI_FIRMWARE_REQUIRED
 #endif
 
-#if defined(BOARD_HAS_PORTENTA_VISION_SHIELD)
+#if defined(BOARD_HAS_PORTENTA_VISION_SHIELD_ETHERNET)
   #define BOARD_HAS_ETHERNET
 
   #include <Ethernet.h>