test configurations for both shrinking and growing TL -> MIF

src/main/scala/Configs.scala

@@ -497,6 +497,8 @@ class WithMIFDataBits(n: Int) extends Config(
 
 class MIF128BitConfig extends Config(
   new WithMIFDataBits(128) ++ new BaseConfig)
+class MIF32BitConfig extends Config(
+  new WithMIFDataBits(32) ++ new BaseConfig)
 
 class WithDmaController extends Config(
   (pname, site, here) => pname match {

src/main/scala/TestConfigs.scala

@@ -231,3 +231,10 @@ class FancyMemtestConfig extends Config(
 
 class MIF128BitComparatorConfig extends Config(
   new WithMIFDataBits(128) ++ new ComparatorConfig)
+class MIF128BitMemtestConfig extends Config(
+  new WithMIFDataBits(128) ++ new MemtestConfig)
+
+class MIF32BitComparatorConfig extends Config(
+  new WithMIFDataBits(32) ++ new ComparatorConfig)
+class MIF32BitMemtestConfig extends Config(
+  new WithMIFDataBits(32) ++ new MemtestConfig)