tilelink2 Nodes: generalize a node into inner and outer halves

This lets us create nodes which transform from one bus to another.

src/main/scala/uncore/tilelink2/Parameters.scala

@@ -146,10 +146,10 @@ object AddressSet
 
 case class TLManagerParameters(
   address:            Seq[AddressSet],
-  sinkId:             IdRange         = IdRange(0, 1),
-  regionType:         RegionType.T    = RegionType.GET_EFFECTS,
-  executable:         Boolean         = false, // processor can execute from this memory
-  nodePath:           Seq[TLBaseNode] = Seq(),
+  sinkId:             IdRange       = IdRange(0, 1),
+  regionType:         RegionType.T  = RegionType.GET_EFFECTS,
+  executable:         Boolean       = false, // processor can execute from this memory
+  nodePath:           Seq[RootNode] = Seq(),
   // Supports both Acquire+Release+Finish of these sizes
   supportsAcquire:    TransferSizes = TransferSizes.none,
   supportsArithmetic: TransferSizes = TransferSizes.none,
@@ -292,8 +292,8 @@ case class TLManagerPortParameters(
 }
 
 case class TLClientParameters(
-  sourceId:            IdRange         = IdRange(0,1),
-  nodePath:            Seq[TLBaseNode] = Seq(),
+  sourceId:            IdRange       = IdRange(0,1),
+  nodePath:            Seq[RootNode] = Seq(),
   // Supports both Probe+Grant of these sizes
   supportsProbe:       TransferSizes = TransferSizes.none,
   supportsArithmetic:  TransferSizes = TransferSizes.none,