ERP: enable the speed feature for pruning 3-way partitions

Change-Id: I88f31af2658dce57f727ac8ad4dcd7a4c1324603
diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index 9faabec..c47861d 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -330,7 +330,7 @@
   sf->part_sf.ml_prune_4_partition = 0;
   sf->part_sf.ml_prune_ab_partition = 0;
 
-  sf->part_sf.prune_part_3_with_part_none = 0;
+  sf->part_sf.prune_part_3_with_part_none = 1;
 #else   // CONFIG_EXT_RECUR_PARTITIONS
   sf->part_sf.ml_prune_4_partition = 1;
   sf->part_sf.ml_prune_ab_partition = 1;
@@ -740,7 +740,7 @@
   part_sf->early_term_after_none_split = 0;
 #if CONFIG_EXT_RECUR_PARTITIONS
   part_sf->enable_fast_erp = 0;
-  part_sf->prune_part_3_with_part_none = 0;
+  part_sf->prune_part_3_with_part_none = 1;
 #endif  // CONFIG_EXT_RECUR_PARTITIONS
 }