Adjust speed setting for temporal layers in 1 pass non-rd mode.

For speed 7, real-time mode: Base layer frames are further apart
(for #temporal layers = 3, this is every 4 frames) so worth keeping
same motion search parameters (as in speed 6) on the base layer frames.

Change-Id: Idebf49dda6ef4f3d9a55aee55129a68253f692fb

vp9/encoder/vp9_speed_features.c

@@ -394,6 +394,11 @@ static void set_rt_speed_feature(VP9_COMP *cpi, SPEED_FEATURES *sf,
     sf->adaptive_rd_thresh = 3;
     sf->mv.search_method = FAST_DIAMOND;
     sf->mv.fullpel_search_step_param = 10;
+    if (cpi->svc.number_temporal_layers > 2 &&
+        cpi->svc.temporal_layer_id == 0) {
+      sf->mv.search_method = NSTEP;
+      sf->mv.fullpel_search_step_param = 6;
+    }
   }
   if (speed >= 8) {
     sf->adaptive_rd_thresh = 4;