shrink non coalesced request source before widening

Author: richardyrh

src/main/scala/radiance/muon/MuonTile.scala

@@ -246,6 +246,7 @@ class MuonTile(
     ResponseFIFOFixer() :=
     TLFragmenter(muonParams.l1CacheLineBytes, coalescedReqWidth, alwaysMin = true) :=
     TLWidthWidget(coalescedReqWidth) :=
+    TLSourceShrinker(32) :=
     l0dOut
   val coalXbar = LazyModule(new TLXbar).suggestName("coal_out_agg_xbar").node
   val nonCoalXbar = LazyModule(new TLXbar).suggestName("coal_out_nc_xbar").node