[XS] Change in coreboot[main]: mb/google/rex/var/screebo: Add delay 1ms after Main 3V3

[Paul Menzel (Code Review)]

Attention is currently required from: Dinesh Gehlot, Eran Mitrani, Kapil Porwal, Kun Liu, Tarun.

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/79320?usp=email )

The change is no longer submittable: All-Comments-Resolved is unsatisfied now.

Change subject: mb/google/rex/var/screebo: Add delay 1ms after Main 3V3
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Patch Set 1:

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/79320/comment/4b53d872_1111cbe0 :
PS1, Line 12: when S0ix returns S0, PERST needs to delay until
            : Main 3V3 is stable and then pull up
This should go into the main body of the commit message.

https://review.coreboot.org/c/coreboot/+/79320/comment/7baa78f6_fc15076c :
PS1, Line 12: PERST needs to delay until
            : Main 3V3 is stable
Why? According to the schematics? Why 1 ms and not 3 or 5?