Added getPort back in to Serial interface. Only setPort needed to be removed

platforms/common/Serial.cpp

@@ -130,4 +130,9 @@ bool Serial::setFlowcontrol(FlowControl flowcontrol)
 	return _impl.setFlowcontrol(flowcontrol);
 }
 
+const char *Serial::getPort() const
+{
+	return _impl.getPort();
+}
+
 } // namespace device