Merge commit 'b4dd424d'

* commit 'b4dd424d':
  Remove all SPARC architecture optimizations

Conflicts:
	Makefile
	configure
	libavcodec/sparc/dsputil_vis.c
	libavcodec/sparc/dsputil_vis.h
	libavcodec/sparc/hpeldsp_vis.c
	libavcodec/sparc/simple_idct_vis.c
	libavcodec/sparc/vis.h
	libswscale/sparc/yuv2rgb_vis.c
	libswscale/swscale_internal.h

If someone wants to maintain these (or other) SPARC optimizations, please
contact me or ffmpeg-devel.
I am happy to revert this removial if theres someone considering to
maintain this code.

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