mb/google/fizz: Add AC/DC loadline settings

This patch adds AC and DC loadline settings since vr_config_enable is
set. Without correct AD/DC loadline settings, VRs reported incorrect
VID values which caused CPU freqency clipping. The clipping reason
could be retrieved from MSR 0x64F. From VRTT report, the AC/DC
loadline resistances are within spec, we can use default value defined
in Table 6-1, doc #543977.

BUG=b:70646304
BRANCH=None
TEST=emerge-fizz coreboot chromeos-bootimage & Read AC/DC loadline
     settings from DCI to ensure the values were programmed correctly.

Change-Id: Id0ce29fa5726ca3711aa4c822fb123e2de7bc48f
Signed-off-by: Gaggery Tsai <gaggery.tsai@intel.com>
Reviewed-on: https://review.coreboot.org/23349
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions