rocketchip: don't use explicit cde namespace

src/main/scala/unittest/TestHarness.scala

@@ -3,8 +3,9 @@
 package unittest
 
 import Chisel._
+import cde._
 
-class TestHarness(implicit val p: cde.Parameters) extends Module {
+class TestHarness(implicit val p: Parameters) extends Module {
   val io = new Bundle { val success = Bool(OUTPUT) }
   io.success := Module(new UnitTestSuite).io.finished
 }