[S] Change in coreboot[main]: soc/intel/pantherlake: Add early shutdown notification hook

[Kapil Porwal (Code Review)]

Attention is currently required from: Christian Walter, Intel coreboot Reviewers, Jayvik Desai, Julius Werner, Karthik Ramasubramanian, Pranava Y N, Subrata Banik.

Kapil Porwal has posted comments on this change by Subrata Banik. ( https://review.coreboot.org/c/coreboot/+/86476?usp=email )

Change subject: soc/intel/pantherlake: Add early shutdown notification hook
......................................................................

Patch Set 4:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/86476/comment/abcffad7_fe5c577d?usp... :
PS4, Line 16: This patch also refactor `fill_fspm_sign_of_life` to use UX API
            : `ux_inform_user_of_update_operation` for memory training notification.
            : 
Can we move this to another CL?