libvpx: Pull from upstream

source/libvpx/vpx_ports/x86.h

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 150 matching lines @@
   /* Get the leaf 7 feature flags. Needed to check for AVX2 support */
   reg_eax = 7;
   reg_ecx = 0;
   cpuid(7, 0, reg_eax, reg_ebx, reg_ecx, reg_edx);
 
   if (reg_ebx & BIT(5)) flags |= HAS_AVX2;
 
   return flags & mask;
 }
 
-vpx_cpu_t vpx_x86_vendor(void);
-
 #if ARCH_X86_64 && defined(_MSC_VER)
 unsigned __int64 __rdtsc(void);
 #pragma intrinsic(__rdtsc)
 #endif
 static unsigned int
 x86_readtsc(void) {
 #if defined(__GNUC__) && __GNUC__
   unsigned int tsc;
   __asm__ __volatile__("rdtsc\n\t":"=a"(tsc):);
   return tsc;
@@ skipping 76 matching lines @@
 }
 
 
 extern void vpx_reset_mmx_state(void);
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // VPX_PORTS_X86_H_