merged bugfix openwch#92 / # 112

Author: maxint-rd

cores/arduino/HardwareSerial.h

@@ -191,16 +191,16 @@ class HardwareSerial : public Stream {
 #if defined(UART4) || defined(USART4)
   extern HardwareSerial Serial4;
 #endif
-#if defined(UART5) || defined(USART5)
+#if defined(UART5)
   extern HardwareSerial Serial5;
 #endif
-#if defined(USART6) || defined(USART6)
+#if defined(UART6)
   extern HardwareSerial Serial6;
 #endif
-#if defined(UART7) || defined(USART7)
+#if defined(UART7)
   extern HardwareSerial Serial7;
 #endif
-#if defined(UART8) || defined(USART8)
+#if defined(UART8)
   extern HardwareSerial Serial8;
 #endif