[POWERPC] 4xx Kconfig cleanup

Remove some leftover cruft in the 40x Kconfig file.  Also make sure we
select WANT_DEVICE_TREE for 40x.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
2 files changed