libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_denoiser.c

Index: source/libvpx/vp9/encoder/vp9_denoiser.c
diff --git a/source/libvpx/vp9/encoder/vp9_denoiser.c b/source/libvpx/vp9/encoder/vp9_denoiser.c
index 7d4e26aaf2f72acab9b790fd517b2cdf64e7b0e3..4f245e2499cd414a5344d92ffb80d4612e2e55ed 100644
--- a/source/libvpx/vp9/encoder/vp9_denoiser.c
+++ b/source/libvpx/vp9/encoder/vp9_denoiser.c
@@ -403,10 +403,7 @@ void vp9_denoiser_update_frame_info(VP9_DENOISER *denoiser,
 
 void vp9_denoiser_reset_frame_stats(PICK_MODE_CONTEXT *ctx) {
   ctx->zeromv_sse = UINT_MAX;
-  // This should be initialized as zero since mode search stage might skip
-  // NEWMV mode if inferred motion vector modes provide sufficiently good
-  // prediction quality.
-  ctx->newmv_sse = 0;
+  ctx->newmv_sse = UINT_MAX;
 }
 
 void vp9_denoiser_update_frame_stats(MB_MODE_INFO *mbmi, unsigned int sse,
@@ -418,7 +415,7 @@ void vp9_denoiser_update_frame_stats(MB_MODE_INFO *mbmi, unsigned int sse,
     ctx->best_zeromv_reference_frame = mbmi->ref_frame[0];
   }
 
-  if (mode == NEWMV) {
+  if (mbmi->mv[0].as_int != 0 && sse < ctx->newmv_sse) {
     ctx->newmv_sse = sse;
     ctx->best_sse_inter_mode = mode;
     ctx->best_sse_mv = mbmi->mv[0];