Revert "xscore: enable 128rob as default"

This reverts commit f7bed381.

src/main/scala/xiangshan/XSCore.scala

@@ -47,15 +47,15 @@ case class XSCoreParameters
   DecodeWidth: Int = 6,
   RenameWidth: Int = 6,
   CommitWidth: Int = 6,
-  BrqSize: Int = 32,
+  BrqSize: Int = 16,
   IssQueSize: Int = 8,
   NRPhyRegs: Int = 128,
   NRIntReadPorts: Int = 8,
   NRIntWritePorts: Int = 8,
   NRFpReadPorts: Int = 14,
   NRFpWritePorts: Int = 8,
-  LsroqSize: Int = 64,
-  RoqSize: Int = 128,
+  LsroqSize: Int = 16,
+  RoqSize: Int = 32,
   dpParams: DispatchParameters = DispatchParameters(
     DqEnqWidth = 4,
     IntDqSize = 64,