[XS] Change in coreboot[main]: nb/intel/sandybridge/raminit: Update PM_DLL_CONFIG to match MRC.bin

[Paul Menzel (Code Review)]

Attention is currently required from: Angel Pons, Arthur Heymans, Felix Singer, Maximilian Brune, Patrick Rudolph.

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/79759?usp=email )

Change subject: nb/intel/sandybridge/raminit: Update PM_DLL_CONFIG to match MRC.bin
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Patch Set 2: Code-Review+1

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/79759/comment/39e44471_4188ee36 :
PS2, Line 9: A register dump between native and MRC.bin raminit showed
           : a difference in the PM_DLL_CONFIG register.
           : Use the same value as MRC.bin uses.
Could be two lines, but feel free to ignore.