avcodec: loongson move simple idct functions to a separate file

Signed-off-by: ZhouXiaoyong <zhouxiaoyong@loongson.cn>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/mips/Makefile

@@ -63,4 +63,5 @@ MMI-OBJS-$(CONFIG_H264DSP)                += mips/h264dsp_mmi.o
 MMI-OBJS-$(CONFIG_H264CHROMA)             += mips/h264chroma_mmi.o
 MMI-OBJS-$(CONFIG_H264PRED)               += mips/h264pred_mmi.o
 MMI-OBJS-$(CONFIG_MPEGVIDEO)              += mips/mpegvideo_mmi.o
-MMI-OBJS-$(CONFIG_IDCTDSP)                += mips/idctdsp_mmi.o
+MMI-OBJS-$(CONFIG_IDCTDSP)                += mips/idctdsp_mmi.o           \
+                                             mips/simple_idct_mmi.o

libavcodec/mips/idctdsp_init_mips.c

@@ -61,7 +61,7 @@ static av_cold void idctdsp_init_mmi(IDCTDSPContext *c, AVCodecContext *avctx,
 }
 #endif /* HAVE_MMI */
 
-void ff_idctdsp_init_mips(IDCTDSPContext *c, AVCodecContext *avctx,
+av_cold void ff_idctdsp_init_mips(IDCTDSPContext *c, AVCodecContext *avctx,
                           unsigned high_bit_depth)
 {
 #if HAVE_MSA