[M] Change in coreboot[main]: soc/intel/cse: Back up PSR data during CSE FW downgrade

[Rizwan Qureshi (Code Review)]

Attention is currently required from: Anil Kumar K, Jérémy Compostella, Krishna P Bhat D, Paul Menzel, Subrata Banik, sridhar siricilla.

Rizwan Qureshi has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74577?usp=email )

Change subject: soc/intel/cse: Back up PSR data during CSE FW downgrade
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Patch Set 54:

(1 comment)

File src/soc/intel/common/block/cse/cse_lite.c:

https://review.coreboot.org/c/coreboot/+/74577/comment/b87e3897_2e168bfd :
PS50, Line 1125: An attempt to send PSR back-up command has been made.
> > > something like "Back-up failed", is what i'm looking for record purposes. […]

Sure, I have added section in the document in end as "Opens from code review for retrospective"