[FFmpeg-devel] Add LSX optimization in avcodec and swscale.

[Hao Chen]

v1: Add LSX optimization in avcodec and swscale, due to the 2K series CPUs only support lsx.
[PATCH v1 1/6] avcodec/la: add LSX optimization for h264 idct.
[PATCH v1 2/6] avcodec/la: Add LSX optimization for loop filter.
[PATCH v1 3/6] avcodec/la: Add LSX optimization for h264 chroma and
[PATCH v1 4/6] avcodec/la: Add LSX optimization for h264 qpel.
[PATCH v1 5/6] swscale/la: Optimize the functions of the swscale
[PATCH v1 6/6] swscale/la: Add following builtin optimized functions