cpu-o3: open microtage

Change-Id: Id59dc54bf51794bbe3ac067829ca10ca8014be9f

Author: Cao Jiaming

configs/example/kmhv3.py

@@ -101,7 +101,7 @@ def setKmhV3Params(args, system):
 
             cpu.branchPred.ubtb.enabled = True
             cpu.branchPred.abtb.enabled = True
-            cpu.branchPred.microtage.enabled = False
+            cpu.branchPred.microtage.enabled = True
             cpu.branchPred.mbtb.enabled = True
             cpu.branchPred.tage.enabled = True
             cpu.branchPred.ittage.enabled = True