cpu: default to full resolve train rollout

Enable packet-based resolve training by default while keeping legacy resolve updates enabled as fallback until the remaining components are migrated.

Change-Id: I124f9657b46ad9e19bb0bf81f3d3ec85592d25ab

Author: Yakkhini

src/cpu/o3/BaseO3CPU.py

@@ -247,6 +247,10 @@ def support_take_over(cls):
     branchPred = Param.BranchPredictor(DecoupledBPUWithBTB(),
                                        "Branch Predictor")
     resolveQueueSize = Param.Unsigned(16, "Number of entries in the branch resolution queue")
+    enableFullResolveTrain = Param.Bool(True,
+        "Enable packet-based resolve training rollout plumbing")
+    enableLegacyResolveUpdate = Param.Bool(True,
+        "Enable legacy PC-only resolve update")
     needsTSO = Param.Bool(False, "Enable TSO Memory model")
 
     scheduler = Param.Scheduler("")