qemu: Move skip for implicit PHB of pSeries guests
qemu: Move skip for implicit PHB of pSeries guests

Performing the skip earlier will help us making the function
nicer later on. We also make the condition for the skip a bit
more precise, though that'a more for self-documenting purposes
and doesn't change anything in practice.

Signed-off-by: Andrea Bolognani <3ada0bee826c753786fdbba72243dfba997094cf@redhat.com>

fabianfreyer/libvirt,eskultety/libvirt,fabianfreyer/libvirt,eskultety/libvirt,zippy2/libvirt,zippy2/libvirt,zippy2/libvirt,zippy2/libvirt,jardasgit/libvirt,olafhering/libvirt,crobinso/libvirt,jfehlig/libvirt,andreabolognani/libvirt,crobinso/libvirt,eskultety/libvirt,olafhering/libvirt,jardasgit/libvirt,eskultety/libvirt,jfehlig/libvirt,jfehlig/libvirt,libvirt/libvirt,libvirt/libvirt,libvirt/libvirt,andreabolognani/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,olafhering/libvirt,nertpinx/libvirt,jfehlig/libvirt,andreabolognani/libvirt,eskultety/libvirt,jardasgit/libvirt,nertpinx/libvirt,olafhering/libvirt,libvirt/libvirt,crobinso/libvirt,crobinso/libvirt,nertpinx/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,andreabolognani/libvirt