Documentation/powerpc/booting-without-of.txt specifies the
compatiables we should bind to for this driver (elo, eloplus).
Use these instead of the extremely specific 'mpc8540' and 'mpc8349'
compatiables.
Acked-by: NDan Williams <dan.j.williams@intel.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>