libvpx: Pull from upstream

source/libvpx/vp8/common/x86/vp8_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.
  */
 
@@ skipping 220 matching lines @@
             &xsum1, &xxsum1
         );
         xsum0 += xsum1;
         xxsum0 += xxsum1;
     }
 
     *sse = xxsum0;
     return (xxsum0 - (((unsigned int)xsum0 * xsum0) >> 8));
 }
 
-unsigned int vp8_sub_pixel_mse16x16_wmt(
-    const unsigned char  *src_ptr,
-    int  src_pixels_per_line,
-    int  xoffset,
-    int  yoffset,
-    const unsigned char *dst_ptr,
-    int dst_pixels_per_line,
-    unsigned int *sse
-)
-{
-    vp8_sub_pixel_variance16x16_wmt(src_ptr, src_pixels_per_line, xoffset, yoffset, dst_ptr, dst_pixels_per_line, sse);
-    return *sse;
-}
-
 unsigned int vp8_sub_pixel_variance16x8_wmt
 (
     const unsigned char  *src_ptr,
     int  src_pixels_per_line,
     int  xoffset,
     int  yoffset,
     const unsigned char *dst_ptr,
     int dst_pixels_per_line,
     unsigned int *sse
 
@@ skipping 143 matching lines @@
     unsigned int xxsum0;
 
     vp8_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));
 }