Add the missing Capsule.h for potential reference.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4957 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Sample/Platform/Generic/Pei/Capsule/Capsule.h

@@ -0,0 +1,27 @@
+/*++        
+
+Copyright (c) 2004 - 2006, Intel Corporation                                                         
+All rights reserved. This program and the accompanying materials                          
+are licensed and made available under the terms and conditions of the BSD License         
+which accompanies this distribution.  The full text of the license may be found at        
+http://opensource.org/licenses/bsd-license.php                                            
+                                                                                          
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+
+Module Name:
+
+  Capsule.h
+
+Abstract:
+  
+--*/
+
+#ifndef _CAPSULE_PEIM_H
+#define _CAPSULE_PEIM_H
+
+//
+// If capsule data is passed via a variable, then this name should be used.
+//
+#define EFI_CAPSULE_VARIABLE_NAME L"CapsuleUpdateData"
+#endif