Fill in serial field for all HID controllers using hidapi

Controllers/AMDWraithPrismController/RGBController_AMDWraithPrism.cpp

@@ -19,6 +19,7 @@ RGBController_AMDWraithPrism::RGBController_AMDWraithPrism(AMDWraithPrismControl
     description = "AMD Wraith Prism Device";
     version     = wraith->GetFirmwareVersionString();
     location    = wraith->GetLocationString();
+    serial      = wraith->GetSerialString();
 
     mode Direct;
     Direct.name       = "Direct";