Ummm- because sfb isn't compiled for GENERIC or ALPHA, etc., there
are undefined references. I'm not sure entirely what's intended
here or I'd just uncomment the sfb lines in these config files
to let sfb && cfb live for the generic cases.

Allen- is it safe to just have this stuff turned on? I mean, I haven't
checked it on a TC alpha as Jason is the only I know who 'owns' one-
but these code paths won't get exercised here unless you actually
do boot a TC alpha, right?

-matt