vp56: Mark VP6-only optimizations as such.

Most of our VP56 optimizations are VP6-only and will stay that way.
So avoid compiling them for VP5-only builds.
libfdk-aacdec: formatting cosmetics
arm: h264chroma: Do not compile h264_chroma_mc* dependent on h264 decoder

The functions are used by all codecs that enable the h264chroma component
and the file is already compiled conditional on h264chroma being enabled.
Merge commit '8506ff97c9ea4a1f52983497ecf8d4ef193403a9'

* commit '8506ff97c9ea4a1f52983497ecf8d4ef193403a9':
  vp56: Mark VP6-only optimizations as such.

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '84784c297fe6a6e538a7e111dcdbd8b893c2d275'

* commit '84784c297fe6a6e538a7e111dcdbd8b893c2d275':
  libfdk-aacdec: formatting cosmetics

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  arm: h264chroma: Do not compile h264_chroma_mc* dependent on h264 decoder

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/h263dec: fix aspect of lead h263 EHC

Fixes part of ticket925

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>