default_secondary_reload: class vs scratch_class

[DJ Delorie]

> I'd hesitate to apply patches to default_secondary_reload.

Even if it's wrong?

> If your port triggers any of the sanity checks, convert it to the
> new infrastructure, as it provides a much better interface.

In my case, I'm just trying to get the am33 port to function, because
I have some patches I need to test.  I don't currently have the
resources to do that kind of change, and there are a *lot* of ports
that still use the macros.