[WIP] Create kernel-core and kernel-drivers subpackages

[Bill Nottingham]

Josh Boyer (jwboyer at fedoraproject.org) said: 
> > 2) A per-arch filter list, because the existing one that works on
> > x86_64 leaves modules in kernel-core on ARM that lack their
> > dependencies.  Bad.
> 
> OK, I sorted this out this week.  I believe the only arch left to do is
> s390x and that's only because I forgot about it.  Oops.

Is this even needed on s390 for reasons other than consistency? Similarly
with power, is the idea to have a core kernel for running on an LPAR and
then -drivers for the rest of it?

Bill