Small tweak in the constant quality parameter

Improves results a little.

Change-Id: I7bcac02dbb65b43a993445cf557c520197114e5c

vp9/encoder/vp9_onyx_if.c

diff --git a/vp9/encoder/vp9_onyx_if.c b/vp9/encoder/vp9_onyx_if.c
index 1d0733e..d815dc9 100644
--- a/vp9/encoder/vp9_onyx_if.c
+++ b/vp9/encoder/vp9_onyx_if.c
@@ -215,7 +215,7 @@
     afq_high_motion_minq[i] = calculate_minq_index(maxq,
                                                    0.0000021,
                                                    -0.00125,
-                                                   0.57,
+                                                   0.55,
                                                    0.0);
   }
 }