!fixup VirtIOSerial and virtio: Fix typo

Author: kbumsik

cores/arduino/VirtIOSerial.cpp

@@ -71,13 +71,13 @@ void VirtIOSerial::begin(void)
 
 void VirtIOSerial::begin(uint32_t /* baud_count */)
 {
-  // uart config is ignored in OpenAmp
+  // uart config is ignored in OpenAMP
   begin();
 }
 
 void VirtIOSerial::begin(uint32_t /* baud_count */, uint8_t /* config */)
 {
-  // uart config is ignored in OpenAmp
+  // uart config is ignored in OpenAMP
   begin();
 }
 

cores/arduino/VirtIOSerial.h

@@ -31,7 +31,7 @@
 #include "virtio_buffer.h"
 
 //================================================================================
-// Serial over OpenAmp
+// Serial over OpenAMP
 
 // This structure is used to be able to get VirtIOSerial instance (C++ class)
 // from handler (C structure) specially for rpmsg message management