powerpc/40x: Convert AMCC Kilauea/Halekala boards to ppc40x_simple

This cleans up the kilauea/halekala board ports to use the ppc40x_simple
platform support.

Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
5 files changed