Rename the I2 port class.

Globals.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2018,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017,2018,2020,2021 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -100,12 +100,12 @@ enum MMDVM_STATE {
 #include "CalNXDN.h"
 #include "CalPOCSAG.h"
 #include "CalRSSI.h"
-#include "I2CPort.h"
 #include "I2COLED.h"
 #include "CWIdTX.h"
 #include "AX25RX.h"
 #include "AX25TX.h"
 #include "Debug.h"
+#include "I2C3.h"
 #include "IO.h"
 #include "FM.h"