Rename MPV_common_init_ppc to MPV_common_init_altivec, the function is

AltiVec-specific now.

Originally committed as revision 10652 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/mpegvideo.c

@@ -152,7 +152,7 @@ static int DCT_common_init(MpegEncContext *s)
 #elif defined(ARCH_ARMV4L)
     MPV_common_init_armv4l(s);
 #elif defined(HAVE_ALTIVEC)
-    MPV_common_init_ppc(s);
+    MPV_common_init_altivec(s);
 #elif defined(ARCH_BFIN)
     MPV_common_init_bfin(s);
 #endif

libavcodec/ppc/mpegvideo_altivec.c

@@ -606,7 +606,7 @@ POWERPC_PERF_STOP_COUNT(altivec_dct_unquantize_h263_num, nCoeffs == 63);
 extern void idct_put_altivec(uint8_t *dest, int line_size, int16_t *block);
 extern void idct_add_altivec(uint8_t *dest, int line_size, int16_t *block);
 
-void MPV_common_init_ppc(MpegEncContext *s)
+void MPV_common_init_altivec(MpegEncContext *s)
 {
     if (s->avctx->lowres==0)
     {