Exclude hbd functions in aom_dsp from HBD flag.

1% reduction on binary size.

All hbd functions in aom_dsp_rtcd_defs.pl have been excluded.

BUG=aomedia:2397

Change-Id: I8d97e91774e6938891f22bdd6da436fcd4549fbb
diff --git a/test/obmc_sad_test.cc b/test/obmc_sad_test.cc
index 5c7d99e..75d7cda 100644
--- a/test/obmc_sad_test.cc
+++ b/test/obmc_sad_test.cc
@@ -145,6 +145,7 @@
 INSTANTIATE_TEST_CASE_P(AVX2, ObmcSadTest, ::testing::ValuesIn(avx2_functions));
 #endif  // HAVE_AVX2
 
+#if CONFIG_AV1_HIGHBITDEPTH
 ////////////////////////////////////////////////////////////////////////////////
 // High bit-depth
 ////////////////////////////////////////////////////////////////////////////////
@@ -262,4 +263,5 @@
 INSTANTIATE_TEST_CASE_P(AVX2, ObmcSadHBDTest,
                         ::testing::ValuesIn(avx2_functions_hbd));
 #endif  // HAVE_AVX2
+#endif  // CONFIG_AV1_HIGHBITDEPTH
 }  // namespace