[S] Change in coreboot[main]: mb/google/fatcat: Allow board-specific FSP-M UPD override

[Subrata Banik (Code Review)]

Attention is currently required from: Intel coreboot Reviewers, Jayvik Desai, Kapil Porwal, Pranava Y N, Sowmya Aralguppe.

Hello Intel coreboot Reviewers, Jayvik Desai, Kapil Porwal, Pranava Y N, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/87089?usp=email

to look at the new patch set (#2).

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

Change subject: mb/google/fatcat: Allow board-specific FSP-M UPD override
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mb/google/fatcat: Allow board-specific FSP-M UPD override

This commit introduces a mechanism to allow mainboards to override
the default FSP-M UPDs for Panther Lake.

- Adds `variant_update_soc_memory_init_params` as a weak function
  in `variants.h` and `romstage.c` for board-specific implementations.
- In `romstage.c`, `mainboard_memory_init_params` now calls
  `variant_update_soc_memory_init_params` to apply board-specific
  overrides to the FSP-M UPDs.

This enables finer-grained control over memory initialization parameters
at the variant level.

BUG=b:328770565
TEST=Able to reduce the boot time by 18ms.

Change-Id: I403bc4270ef526363defa6cd7d22741ad42a8a76
Signed-off-by: Subrata Banik 
---
M src/mainboard/google/fatcat/romstage.c
M src/mainboard/google/fatcat/variants/baseboard/include/baseboard/variants.h
2 files changed, 11 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/89/87089/2