TileLinkNarrower should do nothing if interfaces are the same width

uncore/src/main/scala/tilelink.scala

@@ -1488,6 +1488,7 @@ class TileLinkIONarrower(factor: Int) extends  TLModule {
     val out = Bundle(new ClientUncachedTileLinkIO)(outerParams)
   }
 
+  if (factor > 1) {
     val iacq = io.in.acquire.bits
     val ognt = io.out.grant.bits
 
@@ -1572,4 +1573,5 @@ class TileLinkIONarrower(factor: Int) extends  TLModule {
       ignt_ctr.inc()
       sending_get := Bool(false)
     }
+  } else { io.out <> io.in }
 }