chore(MMUConst): raise time out threshold (#3549)

With CHI enabled and CMN connected, a transaction may easily last over
10,000 cycles. This commit raises the time out threshold of PTW to
100,000 cycles.

src/main/scala/xiangshan/cache/mmu/MMUConst.scala

@@ -125,7 +125,7 @@ trait HasTlbConst extends HasXSParameter {
 
   val sramSinglePort = true
 
-  val timeOutThreshold = 10000
+  val timeOutThreshold = 100000
 
   def noS2xlate = "b00".U
   def allStage = "b11".U