Implement SerialPortLib and PlatformHookLib with System76EcLib

UefiPayloadPkg/Include/Library/System76EcLib.h

@@ -1,26 +0,0 @@
-/** @file
-  System76 EC logging
-
-  Copyright (c) 2020 System76, Inc.
-  SPDX-License-Identifier: BSD-2-Clause-Patent
-
-**/
-
-#ifndef __SYSTEM76_EC_LIB__
-#define __SYSTEM76_EC_LIB__
-
-/**
-  Write data to the embedded controller using SMFI command interface.
-
-  @param  Buffer            Pointer to the data buffer to be written.
-  @param  NumberOfBytes     Number of bytes to write.
-
-  @return -1 if the command failed, else the number of data bytes written.
-**/
-INTN
-System76EcWrite (
-  IN UINT8    *Buffer,
-  IN UINTN    NumberOfBytes
-);
-
-#endif /* __SYSTEM76_EC_LIB__ */