libvpx: Pull from upstream

source/config/linux/arm-neon-cpu-detect/vp9_rtcd.h

Index: source/config/linux/arm-neon-cpu-detect/vp9_rtcd.h
diff --git a/source/config/linux/arm-neon-cpu-detect/vp9_rtcd.h b/source/config/linux/arm-neon-cpu-detect/vp9_rtcd.h
index b664b187c8b3e34e2e99d24f2400b285454f16bd..7d69b4c9720a2135eb5ebdcce13138efa5ddce7e 100644
--- a/source/config/linux/arm-neon-cpu-detect/vp9_rtcd.h
+++ b/source/config/linux/arm-neon-cpu-detect/vp9_rtcd.h
@@ -131,7 +131,8 @@ void vp9_temporal_filter_apply_c(uint8_t *frame1, unsigned int stride, uint8_t *
 #define vp9_temporal_filter_apply vp9_temporal_filter_apply_c
 
 int vp9_vector_var_c(int16_t const *ref, int16_t const *src, const int bwl);
-#define vp9_vector_var vp9_vector_var_c
+int vp9_vector_var_neon(int16_t const *ref, int16_t const *src, const int bwl);
+RTCD_EXTERN int (*vp9_vector_var)(int16_t const *ref, int16_t const *src, const int bwl);
 
 void vp9_rtcd(void);
 
@@ -161,6 +162,8 @@ static void setup_rtcd_internal(void)
     if (flags & HAS_NEON) vp9_int_pro_row = vp9_int_pro_row_neon;
     vp9_quantize_fp = vp9_quantize_fp_c;
     if (flags & HAS_NEON) vp9_quantize_fp = vp9_quantize_fp_neon;
+    vp9_vector_var = vp9_vector_var_c;
+    if (flags & HAS_NEON) vp9_vector_var = vp9_vector_var_neon;
 }
 #endif