mips msa vp8 bilinear filter optimization

average improvement ~3x-4x

Change-Id: I8c0b3d5c86c9eb4f802b87c971864d2cfceeb7cc
diff --git a/vp8/vp8_common.mk b/vp8/vp8_common.mk
index 3e39095..2cf189d 100644
--- a/vp8/vp8_common.mk
+++ b/vp8/vp8_common.mk
@@ -114,6 +114,7 @@
 VP8_COMMON_SRCS-$(HAVE_DSPR2)  += common/mips/dspr2/dequantize_dspr2.c
 
 # common (c)
+VP8_COMMON_SRCS-$(HAVE_MSA) += common/mips/msa/bilinear_filter_msa.c
 VP8_COMMON_SRCS-$(HAVE_MSA) += common/mips/msa/copymem_msa.c
 VP8_COMMON_SRCS-$(HAVE_MSA) += common/mips/msa/idct_msa.c
 VP8_COMMON_SRCS-$(HAVE_MSA) += common/mips/msa/loopfilter_filters_msa.c