EmbeddedPkg: Introduced a separate SerialPortExtLib library

Formerly only the header was defined and it was expecting the SerialPortExtLib
interface to be implemented by SerialPortLib if supported. This behaviour was
not conform to the EDK2 framework.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14173 6f19259b-4bc3-4df7-8a09-765794883524

Omap35xxPkg/Library/SerialPortLib/SerialPortLib.c

@@ -17,7 +17,6 @@
 #include <Base.h>
 #include <Library/DebugLib.h>
 #include <Library/SerialPortLib.h>
-#include <Library/SerialPortExtLib.h>
 #include <Library/PcdLib.h>
 #include <Library/IoLib.h>
 #include <Library/OmapLib.h>
@@ -123,57 +122,3 @@ SerialPortPoll (
   }
 }
 
-/**
-  Set the serial device control bits.
-
-  @return    Always return EFI_UNSUPPORTED.
-
-**/
-RETURN_STATUS
-EFIAPI
-SerialPortSetControl (
-  IN UINT32                   Control
-  )
-{
-  return RETURN_SUCCESS;
-}
-
-/**
-  Get the serial device control bits.
-
-  @param  Control                 Control signals read from the serial device.
-
-  @retval EFI_SUCCESS             The control bits were read from the serial device.
-  @retval EFI_DEVICE_ERROR        The serial device is not functioning correctly.
-
-**/
-RETURN_STATUS
-EFIAPI
-SerialPortGetControl (
-  OUT UINT32                  *Control
-  )
-{
-  return RETURN_SUCCESS;
-}
-
-
-/**
-  Set the serial device attributes.
-
-  @return    Always return EFI_UNSUPPORTED.
-
-**/
-RETURN_STATUS
-EFIAPI
-SerialPortSetAttributes (
-  IN UINT64              BaudRate,
-  IN UINT32              ReceiveFifoDepth,
-  IN UINT32              Timeout,
-  IN EFI_PARITY_TYPE     Parity,
-  IN UINT8               DataBits,
-  IN EFI_STOP_BITS_TYPE  StopBits
-  )
-{
-  return RETURN_SUCCESS;
-}
-