soc/intel/skylake: Override KBL IccMax settings

According to Intel document #559100 KBL EDS v2.8, section 7.2
DC specifications, the IccMax setting for KBL-U, KBL-U42 and
Celeron/Pentium are different. This patch overrides the IccMax
settings for KBL-U/R/Y since device tree could not handle all
KBL-U/R combinations when multiple SKUs are adopted in a project.
Besides, it is inefficient to maintain the same code for all
variants. Hence, place it in the common code so that all variants
could leverage the benefits.

+----------------+-------------+---------------+------+-----+
| Domain/Setting |  SA         |  IA           | GTUS | GTS |
+----------------+-------------+---------------+------+-----+
| IccMax(KBL-U/R)| 6A(U42)     | 64A(U42)      | 31A  | 31A |
|                | 4.5A(Others)| 29A(Celeron)  |      |     |
|                |             | 32A(i3/i5)    |      |     |
+----------------+-------------+---------------+------+-----+
| IccMax(KBL-Y)  | 4.1A        | 24A           | 24A  | 24A |
+----------------+-------------+---------------+------+-----+

BUG=b:71369428
BRANCH=None
TEST=Remove icc_max setting from devicetree & emerge-fizz coreboot
     chromeos-bootimage & Ensure the KBL-U42, KBL-U22 and Celeron
     SKUs are identified correctly and IccMax settings are passed
     to FSPS correctly.

Change-Id: I291462b73d3fbd17f17975de7fd77dc48ca99251
Signed-off-by: Gaggery Tsai <gaggery.tsai@intel.com>
Reviewed-on: https://review.coreboot.org/23060
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

0 files changed, 0 insertions, 0 deletions