Move a bunch more things into util package

A lot of utility code was just being imported willy-nilly from one
package to another. This moves the common code into util to make things
more sensible. The code moved were

 * The AsyncQueue and AsyncDecoupledCrossing from junctions.
 * All of the code in rocket's util.scala
 * The BlackBox asynchronous reset registers from uncore.tilelink2
 * The implicit definitions from uncore.util

src/main/scala/rocketchip/BaseTop.scala

@@ -8,9 +8,8 @@ import junctions._
 import uncore.tilelink._
 import uncore.tilelink2._
 import uncore.devices._
-import util.{ParameterizedBundle, ConfigStringOutput, GraphMLOutput}
+import util._
 import rocket._
-import rocket.Util._
 import coreplex._
 
 // the following parameters will be refactored properly with TL2

src/main/scala/rocketchip/Configs.scala

@@ -5,12 +5,12 @@ package rocketchip
 import Chisel._
 import junctions._
 import rocket._
-import rocket.Util._
 import uncore.agents._
 import uncore.tilelink._
 import uncore.tilelink2.{LazyModule}
 import uncore.devices._
 import uncore.converters._
+import util._
 import coreplex._
 import scala.math.max
 import scala.collection.mutable.{LinkedHashSet, ListBuffer}

src/main/scala/rocketchip/DebugTransport.scala

@@ -3,6 +3,7 @@ package rocketchip
 import Chisel._
 import uncore.devices.{DebugBusIO, AsyncDebugBusTo, AsyncDebugBusFrom, DebugBusReq, DebugBusResp, DMKey}
 import junctions._
+import util._
 import cde.{Parameters, Field}
 
 case object IncludeJtagDTM extends Field[Boolean]

src/main/scala/rocketchip/Periphery.scala

@@ -12,7 +12,7 @@ import uncore.converters._
 import uncore.devices._
 import uncore.agents._
 import uncore.util._
-import rocket.Util._
+import util._
 import rocket.XLen
 import scala.math.max
 import coreplex._

src/main/scala/rocketchip/TestHarness.scala

@@ -4,8 +4,7 @@ package rocketchip
 
 import Chisel._
 import cde.{Parameters, Field}
-import rocket.Util._
-import util.LatencyPipe
+import util._
 import junctions._
 import junctions.NastiConstants._
 

src/main/scala/rocketchip/Utils.scala

@@ -6,9 +6,9 @@ import cde.{Parameters, Dump}
 import junctions._
 import uncore.devices._
 import rocket._
-import rocket.Util._
 import coreplex._
 import uncore.tilelink2._
+import util._
 
 import java.nio.file.{Files, Paths}
 import java.nio.{ByteBuffer, ByteOrder}