Fix several build break in Ovmf package.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9292 6f19259b-4bc3-4df7-8a09-765794883524

OvmfPkg/Library/NvVarsFileLib/FsAccess.c

@@ -117,7 +117,7 @@ NvVarsFileReadCheckup (
   }
 
   *Exists = TRUE;
-  *Size = FileInfo->FileSize;
+  *Size = (UINTN) FileInfo->FileSize;
 
   FreePool (FileInfo);
 }

OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c

@@ -1,7 +1,7 @@
 /** @file
   Platform BDS customizations.
 
-  Copyright (c) 2004 - 2008, Intel Corporation. <BR>
+  Copyright (c) 2004 - 2009, Intel Corporation. <BR>
   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
@@ -513,7 +513,7 @@ VisitingAPciInstance (
     return Status;
   }
 
-  return (*(VISIT_PCI_INSTANCE_CALLBACK) Context) (
+  return (*(VISIT_PCI_INSTANCE_CALLBACK)(UINTN) Context) (
            Handle,
            PciIo,
            &Pci
@@ -531,7 +531,7 @@ VisitAllPciInstances (
   return VisitAllInstancesOfProtocol (
            &gEfiPciIoProtocolGuid,
            VisitingAPciInstance,
-           (VOID*) CallBackFunction
+           (VOID*)(UINTN) CallBackFunction
            );
 }