Pretty-print MMU available property

v4:
* Pass 1 as #acells and #scells, following IEEE 1275 sect. 3.6.5.
  On ppc the cpu nodes would've had #size-cells as 0.

v3:
* Evaluate /chosen mmu property rather than device_type "cpu".

Signed-off-by: Andreas Färber <andreas.faerber@web.de>


git-svn-id: svn://coreboot.org/openbios/trunk/openbios-devel@959 f158a5a8-5612-0410-a976-696ce0be7e32