vp8: Update on sum_diff_threshold.

Reset to previous values.

Change-Id: Ia49bafc1d1ec5f657819ffba04d11fd701f315e8

vp8/encoder/denoising.h

diff --git a/vp8/encoder/denoising.h b/vp8/encoder/denoising.h
index 34c561d..8c126c1 100644
--- a/vp8/encoder/denoising.h
+++ b/vp8/encoder/denoising.h
@@ -18,8 +18,8 @@
 extern "C" {
 #endif
 
-#define SUM_DIFF_THRESHOLD 448
-#define SUM_DIFF_THRESHOLD_HIGH 512
+#define SUM_DIFF_THRESHOLD 512
+#define SUM_DIFF_THRESHOLD_HIGH 600
 #define MOTION_MAGNITUDE_THRESHOLD (8*3)
 
 #define SUM_DIFF_THRESHOLD_UV (96)   // (8 * 8 * 1.5)