Reduce number of ASM constraints for ff_lpc_compute_autocorr_sse2 since itcauses no significant speed difference and can avoid compilation issues with--enable-pic.
Originally committed as revision 21003 to svn://svn.ffmpeg.org/ffmpeg/trunk
Move autocorrelation function from flacenc.c to lpc.c. Also rename thecorresponding dsputil functions and remove their dependency on the FLACencoder.Fixes Issue1486.
Originally committed as revision 20266 to svn://svn.ffmpeg.org/ffmpeg/trunk