Port AGESA based northbridge code to 64bit

This is extending http://review.coreboot.org/#/c/10583/
(29e6548) to the remaining AGESA northbridge drivers.

Change-Id: I6fa53b36a1420e92cb4aecb0f7b4c71541a94c71
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/11021
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
5 files changed