mb/*/*/Kconfig: Remove default MMCONF_BASE_ADDRESS on Sandy Bridge

Change-Id: I6f0d6d7fefc77fb05cdb629d09de8cb72496a9cc
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/22664
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
3 files changed