rocketchip: move from using cde to config

src/main/scala/unittest/Configs.scala

@@ -3,7 +3,7 @@
 package unittest
 
 import Chisel._
-import cde.{Parameters, Config, CDEMatchError}
+import config._
 import rocketchip.{BaseConfig, BasePlatformConfig}
 
 class WithJunctionsUnitTests extends Config(

src/main/scala/unittest/TestHarness.scala

@@ -3,7 +3,7 @@
 package unittest
 
 import Chisel._
-import cde._
+import config._
 
 class TestHarness(implicit val p: Parameters) extends Module {
   val io = new Bundle { val success = Bool(OUTPUT) }

src/main/scala/unittest/UnitTest.scala

@@ -1,7 +1,7 @@
 package unittest
 
 import Chisel._
-import cde.{Field, Parameters}
+import config._
 import util.SimpleTimer
 
 trait HasUnitTestIO {