Buffer. On output with a return code of EFI_BUFFER_TOO_SMALL,\r
the size of Buffer required to retrieve the requested file.\r
@param Buffer The memory buffer to transfer the file to. IF Buffer is NULL,\r
Buffer. On output with a return code of EFI_BUFFER_TOO_SMALL,\r
the size of Buffer required to retrieve the requested file.\r
@param Buffer The memory buffer to transfer the file to. IF Buffer is NULL,\r