Fix zscale testing

Use the following command in vsim:

make CONFIG=ZscaleConfig MODEL=ZscaleTop TB=ZscaleTestHarness run-asm-tests

src/main/scala/Configs.scala

@@ -277,6 +277,7 @@ class DefaultL2FPGAConfig extends Config(new WithL2Capacity64 ++ new WithL2Cache
 class WithZscale extends Config(
   (pname,site,here) => pname match {
     case XLen => 32
+    case UseFPU => false
     case BuildZscale => {
       TestGeneration.addSuites(List(rv32ui("p"), rv32um("p")))
       TestGeneration.addSuites(List(zscaleBmarks))