soc/intel/apollolake: Disable Periodic Retraining per-SKU

Certain LPDDR4 models have some HW issues that can be worked around
by turning off Periodic Retraining feature in the memory controller.
Add option to disable PR per SKU.

BUG=chrome-os-partner:55466
TEST=run RMT test, pass

Change-Id: Ie7aa79586665f6d3a7edd854a9eef07e6a1b2ab8
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/16320
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)

0 files changed, 0 insertions, 0 deletions