[PATCH] Add Efika platform support

Add Efika (http://www.bplan-gmbh.de/efika_spec_en.html

) platform
support for arch/powerpc.

Signed-off-by: Nicolas DET <nd@bplan-gmbh.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>