PipelineConnect: suggest name for valid

src/main/scala/utils/Pipeline.scala

@@ -6,6 +6,7 @@ import chisel3.util._
 object PipelineConnect {
   def apply[T <: Data](left: DecoupledIO[T], right: DecoupledIO[T], rightOutFire: Bool, isFlush: Bool) = {
     val valid = RegInit(false.B)
+    valid.suggestName("pipeline_valid")
     when (rightOutFire) { valid := false.B }
     when (left.valid && right.ready) { valid := true.B }
     when (isFlush) { valid := false.B }