sandybridge: Disable parallel CPU initialization

Disable the parallel CPU initialization for model_206ax, that is Sandy
Bridge and Ivy Bridge processors. We never did it the way that Intel
recommends and it became unreliable with the introduction of SMM_MODULES
in commit a3e41c0 Migrate 206ax to SMM_MODULES.

Tested by booting kontron/ktqm77 2.6k times into Linux user space. No
issues so far.

Change-Id: Idffc352341419f22a36bf772534a5e11e711edf1
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/12329
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
1 file changed