porting the mmx&sse2 (sse2 untested) vp3 idcts to the lavc idct API

Originally committed as revision 4260 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/dsputil.h

@@ -315,6 +315,7 @@ typedef struct DSPContext {
 #define FF_LIBMPEG2_IDCT_PERM 2
 #define FF_SIMPLE_IDCT_PERM 3
 #define FF_TRANSPOSE_IDCT_PERM 4
+#define FF_PARTTRANS_IDCT_PERM 5
 
     int (*try_8x8basis)(int16_t rem[64], int16_t weight[64], int16_t basis[64], int scale);
     void (*add_8x8basis)(int16_t rem[64], int16_t basis[64], int scale);