UefiPayloadPkg: Add FIT support

Provide Fit format for UniversalPayload, developer can use argument
"--Fit" to build UniversalPayload.fit

Cc: Guo Dong <guo.dong@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Cc: James Lu <james.lu@intel.com>
Cc: Gua Guo <gua.guo@intel.com>

Reviewed-by: Gua Guo <gua.guo@intel.com>

Signed-off-by: BruceX Wang <brucex.wang@intel.com>

UefiPayloadPkg/Include/Guid/UniversalPayloadBase.h

@@ -0,0 +1,19 @@
+/** @file
+  Universal Payload general definitions.
+
+Copyright (c) 2023, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef UNIVERSAL_PAYLOAD_BASE_H_
+#define UNIVERSAL_PAYLOAD_BASE_H_
+
+extern GUID  gUniversalPayloadBaseGuid;
+
+typedef struct {
+  UNIVERSAL_PAYLOAD_GENERIC_HEADER    Header;
+  EFI_PHYSICAL_ADDRESS                Entry;
+} UNIVERSAL_PAYLOAD_BASE;
+
+#endif // UNIVERSAL_PAYLOAD_BASE_H_