Deprecate old and inefficient per instruction asm().

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@11865 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/i386/mmx.h

@@ -21,6 +21,8 @@
 #ifndef FFMPEG_MMX_H
 #define FFMPEG_MMX_H
 
+#warning Everything in this header is deprecated, use plain asm()! New code using this header will be rejected.
+
 /*
  * The type of an value that fits in an MMX register (note that long
  * long constant values MUST be suffixed by LL and unsigned long long