Preserve WithRV32 behavior: FLEN = 32

src/main/scala/coreplex/Configs.scala

@@ -165,6 +165,7 @@ class WithRV32 extends Config((site, here, up) => {
   case XLen => 32
   case RocketTilesKey => up(RocketTilesKey, site) map { r =>
     r.copy(core = r.core.copy(
+      fpu = r.core.fpu.map(_.copy(fLen = 32)),
       mulDiv = Some(MulDivParams(mulUnroll = 8))))
   }
 })