new junctions repo has mem size constants

rocket/src/main/scala/btb.scala

@@ -3,8 +3,8 @@
 package rocket
 
 import Chisel._
+import junctions._
 import Util._
-import uncore._
 
 case object NBTBEntries extends Field[Int]
 case object NRAS extends Field[Int]

rocket/src/main/scala/rocket.scala

@@ -3,6 +3,7 @@
 package rocket
 
 import Chisel._
+import junctions._
 import uncore._
 import Util._
 

rocket/src/main/scala/tlb.scala

@@ -4,7 +4,7 @@ package rocket
 
 import Chisel._
 import Util._
-import uncore._
+import junctions._
 import scala.math._
 
 case object NTLBEntries extends Field[Int]