ahb: include a unit test

src/main/scala/unittest/Configs.scala

@@ -32,6 +32,7 @@ class WithUncoreUnitTests extends Config(
         Module(new uncore.devices.TileLinkRAMTest()),
         Module(new uncore.converters.TileLinkWidthAdapterTest()),
         Module(new uncore.tilelink2.TLFuzzRAMTest),
+        Module(new uncore.ahb.AHBBridgeTest),
         Module(new uncore.axi4.AXI4LiteFuzzRAMTest),
         Module(new uncore.axi4.AXI4FullFuzzRAMTest),
         Module(new uncore.axi4.AXI4BridgeTest)) }