[S] Change in coreboot[main]: mb/google/rex/var/deku: Refactor SSD power sequencing

[Subrata Banik (Code Review)]

Attention is currently required from: Dinesh Gehlot, Eran Mitrani, Jakub Czapiga, Kapil Porwal, Tarun.

Subrata Banik has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/80664?usp=email )

Change subject: mb/google/rex/var/deku: Refactor SSD power sequencing
......................................................................

Patch Set 1:

(1 comment)

Patchset:

PS1: 
@Eran, please test this CL if u have any way to verify Deku