Fixes to compiler warnings in MSVC

firmware/include/sysincludes.h

 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /* System includes for vboot reference library.  This is the ONLY
  * place in firmware/ where system headers may be included via
  * #include <...>, so that there's only one place that needs to be
  * fixed up for platforms which don't have all the system includes.
  *
  * Files in firmware/stub may still include system headers, because
  * they're local implementations and will be ported to each system
  * anyway. */
 
 #ifndef VBOOT_REFERENCE_SYSINCLUDES_H_
 #define VBOOT_REFERENCE_SYSINCLUDES_H_
 
 #ifdef CHROMEOS_ENVIRONMENT
 
 #include <inttypes.h>  /* For PRIu64 */
 #include <stdint.h>
 #include <stdlib.h>
 
 #if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)
 #include <byteswap.h>
 #include <memory.h>
 #endif
 
+/* 64-bit operations, for platforms where they need to be function calls */
+#define UINT64_RSHIFT(v, shiftby) (((uint64_t)(v)) >> (shiftby))
+#define UINT64_MULT32(v, multby)  (((uint64_t)(v)) * ((uint32_t)(multby)))
+
 #else
 #include "stub/biosincludes.h"
 #endif
 
 #endif  /* VBOOT_REFERENCE_SYSINCLUDES_H_ */