mips/asmdefs: change include guard to read AVUTIL_ instead of AVCODEC_

Signed-off-by: James Cowgill <james410@cowgill.org.uk>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/mips/asmdefs.h

@@ -24,8 +24,8 @@
  * assembly (rather than from within .s files).
  */
 
-#ifndef AVCODEC_MIPS_ASMDEFS_H
-#define AVCODEC_MIPS_ASMDEFS_H
+#ifndef AVUTIL_MIPS_ASMDEFS_H
+#define AVUTIL_MIPS_ASMDEFS_H
 
 #include <sgidefs.h>