RFC: Page size on PPC/PPC64 builders

[Bill Nottingham]

David Woodhouse (dwmw2 at infradead.org) said: 
> For 4KiB pages:
>  - Makes life 'easier' for PPC builds, to stop people whining about it
>    finding their bugs for them.
>  - Consistent with what we actually ship in Fedora.

- wastes less memory on lower-mem ppc machines. Not that this should be a
dealbreaker, but it's something to think about.

Bill