[S] Change in coreboot[main]: mb/google/nissa/var/glassway: Tune eMMC DLL values

[Eric Lai (Code Review)]

Attention is currently required from: Daniel Peng, Dinesh Gehlot, Kapil Porwal, Nick Vaccaro, Paul Menzel, Subrata Banik.

Eric Lai has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/80779?usp=email )

Change subject: mb/google/nissa/var/glassway: Tune eMMC DLL values
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Patch Set 3:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/80779/comment/3bbebcbd_75840bd3 :
PS2, Line 9: Update eMMC DLL values to improve initialization reliability.
> Done

I think by running the testing code which is loop all the value and check the delay time.