libvpx: Pull from upstream

source/libvpx/vp9/encoder/x86/vp9_variance_sse2.c

 /*
  *  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.
  */
 
 #include "./vpx_config.h"
 
 #include "vp9/encoder/vp9_variance.h"
 #include "vp9/common/vp9_pragmas.h"
 #include "vpx_ports/mem.h"
 
 extern unsigned int vp9_get4x4var_mmx
 (
   const unsigned char *src_ptr,
   int  source_stride,
   const unsigned char *ref_ptr,
   int  recon_stride,
   unsigned int *SSE,
   int *Sum
 );
 
-unsigned int vp9_get_mb_ss_sse2
-(
-  const int16_t *src_ptr
-);
 unsigned int vp9_get16x16var_sse2
 (
   const unsigned char *src_ptr,
   int source_stride,
   const unsigned char *ref_ptr,
   int recon_stride,
   unsigned int *SSE,
   int *Sum
 );
 unsigned int vp9_get8x8var_sse2
@@ skipping 505 matching lines @@
   unsigned int xxsum0;
 
   vp9_half_horiz_vert_variance16x_h_sse2(
     src_ptr, src_pixels_per_line,
     dst_ptr, dst_pixels_per_line, 16,
     &xsum0, &xxsum0);
 
   *sse = xxsum0;
   return (xxsum0 - (((unsigned int)xsum0 * xsum0) >> 8));
 }