Move mainboard specific changes to the coreboot memory table into the

Move mainboard specific changes to the coreboot memory table into the
mainboard specific code. (And add a hook to allow other mainboards do
a similar thing if required)

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Ronald G Minnich <rminnich@gmail.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3812 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1