Change MMXEXT to MMX2, MMXEXT is deprecated

Originally committed as revision 23865 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/x86/h264dsp_mmx.c

@@ -2364,7 +2364,7 @@ void ff_h264_pred_init_x86(H264PredContext *h, int codec_id)
         }
     }
 
-    if (mm_flags & FF_MM_MMXEXT) {
+    if (mm_flags & FF_MM_MMX2) {
         h->pred16x16[HOR_PRED8x8 ] = ff_pred16x16_horizontal_mmxext;
         h->pred16x16[DC_PRED8x8  ] = ff_pred16x16_dc_mmxext;
         h->pred8x8  [HOR_PRED8x8 ] = ff_pred8x8_horizontal_mmxext;

libavcodec/x86/vp8dsp-init.c

@@ -236,7 +236,7 @@ av_cold void ff_vp8dsp_init_x86(VP8DSPContext* c)
 
     /* note that 4-tap width=16 functions are missing because w=16
      * is only used for luma, and luma is always a copy or sixtap. */
-    if (mm_flags & FF_MM_MMXEXT) {
+    if (mm_flags & FF_MM_MMX2) {
         VP8_LUMA_MC_FUNC(0, 16, mmxext);
         VP8_MC_FUNC(1, 8, mmxext);
         VP8_MC_FUNC(1, 4, mmxext);