Sync some trivial changes from kernel-xen

[Mark McLoughlin]

Hey,
        Now that kernel-xen is back in sync with the stock kernel RPM,
I thought it'd be good to start getting the spec files closer in sync.

        To that end, here are a few patches to start with ...

        More details on our plans for kernel-xen here:

  http://www.redhat.com/archives/fedora-xen/2008-March/msg00013.htmlN^@N^GCheers,N^EMark

Thanks,
Mark.