Add TileId parameter, generalizing GroundTestId

This usually shouldn't be used in Tiles that are meant to be P&R'd once
and multiply instantiated, as their RTL would no longer be homogeneous.
However, it is useful for conditionalizing RTL generation for
heterogeneous tiles.

src/main/scala/coreplex/Configs.scala

@@ -94,8 +94,9 @@ class BaseCoreplexConfig extends Config (
         TestGeneration.addSuites(rvi.map(_("p")))
         TestGeneration.addSuites((if(site(UseVM)) List("v") else List()).flatMap(env => rvu.map(_(env))))
         TestGeneration.addSuite(benchmarks)
-        List.fill(site(NTiles)){ (r: Bool, p: Parameters) =>
+        List.tabulate(site(NTiles)){ i => (r: Bool, p: Parameters) =>
           Module(new RocketTile(resetSignal = r)(p.alterPartial({
+            case TileId => i
             case TLId => "L1toL2"
             case NUncachedTileLinkPorts => 1 + site(RoccNMemChannels)
           })))