tilelink2 Node: make it possible for {Identity,Output,Input}Node to pass a Vec

In order to implement a pass-through RAM Monitor model, we will want to support
a variable number of inputs and outputs with BOTH different manager and client
parameters on each bundle.

src/main/scala/uncore/tilelink2/package.scala

@@ -1,6 +1,7 @@
 package uncore
 
 import Chisel._
+import chisel3.internal.sourceinfo.{SourceInfo, SourceLine, UnlocatableSourceInfo}
 
 package object tilelink2
 {
@@ -9,4 +10,9 @@ package object tilelink2
   def OH1ToUInt(x: UInt) = OHToUInt((x << 1 | UInt(1)) ^ x)
   def UIntToOH1(x: UInt, width: Int) = ~(SInt(-1, width=width).asUInt << x)(width-1, 0)
   def trailingZeros(x: Int) = if (x > 0) Some(log2Ceil(x & -x)) else None
+
+  def sourceLine(sourceInfo: SourceInfo, prefix: String = " (", suffix: String = ")") = sourceInfo match {
+    case SourceLine(filename, line, col) => s"$prefix$filename:$line:$col$suffix"
+    case _ => ""
+  }
 }