Merge commit '89466de4'

* commit '89466de4':
  vp9/x86: rename vp9dsp to vp9mc

File was already renamed, only the top description is updated.
Merged-by: Clément Bœsch <u@pkh.me>

libavcodec/x86/vp9mc.asm

 ;******************************************************************************
-;* VP9 MC SIMD optimizations
+;* VP9 motion compensation SIMD optimizations
 ;*
 ;* Copyright (c) 2013 Ronald S. Bultje <rsbultje gmail com>
 ;*