libvpx: Pull from upstream

source/config/mac/x64/vp8_rtcd.h

Index: source/config/mac/x64/vp8_rtcd.h
diff --git a/source/config/mac/x64/vp8_rtcd.h b/source/config/mac/x64/vp8_rtcd.h
index 0aa98dc0b053ef34193f092d524e3102b00fcbe8..5285ac71055e79826cb2673f28226899e60aa3e8 100644
--- a/source/config/mac/x64/vp8_rtcd.h
+++ b/source/config/mac/x64/vp8_rtcd.h
@@ -276,11 +276,6 @@ void vp8_sixtap_predict8x8_sse2(unsigned char *src, int src_pitch, int xofst, in
 void vp8_sixtap_predict8x8_ssse3(unsigned char *src, int src_pitch, int xofst, int yofst, unsigned char *dst, int dst_pitch);
 RTCD_EXTERN void (*vp8_sixtap_predict8x8)(unsigned char *src, int src_pitch, int xofst, int yofst, unsigned char *dst, int dst_pitch);
 
-unsigned int vp8_sub_pixel_mse16x16_c(const unsigned char  *src_ptr, int  source_stride, int  xoffset, int  yoffset, const unsigned char *ref_ptr, int Refstride, unsigned int *sse);
-unsigned int vp8_sub_pixel_mse16x16_mmx(const unsigned char  *src_ptr, int  source_stride, int  xoffset, int  yoffset, const unsigned char *ref_ptr, int Refstride, unsigned int *sse);
-unsigned int vp8_sub_pixel_mse16x16_wmt(const unsigned char  *src_ptr, int  source_stride, int  xoffset, int  yoffset, const unsigned char *ref_ptr, int Refstride, unsigned int *sse);
-#define vp8_sub_pixel_mse16x16 vp8_sub_pixel_mse16x16_wmt
-
 unsigned int vp8_sub_pixel_variance16x16_c(const unsigned char  *src_ptr, int  source_stride, int  xoffset, int  yoffset, const unsigned char *ref_ptr, int Refstride, unsigned int *sse);
 unsigned int vp8_sub_pixel_variance16x16_mmx(const unsigned char  *src_ptr, int  source_stride, int  xoffset, int  yoffset, const unsigned char *ref_ptr, int Refstride, unsigned int *sse);
 unsigned int vp8_sub_pixel_variance16x16_wmt(const unsigned char  *src_ptr, int  source_stride, int  xoffset, int  yoffset, const unsigned char *ref_ptr, int Refstride, unsigned int *sse);