[coreboot-gerrit] Change in coreboot[master]: mb/intel/shadowmountain: Add bootblock and verstage code

[Nico Huber (Code Review)]

Attention is currently required from: V Sowmya, Martin Roth, Tim Wawrzynczak, Sugnan Prabhu S, Angel Pons, Balaji Manigandan, Aamir Bohra.
Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/49479 )

Change subject: mb/intel/shadowmountain: Add bootblock and verstage code
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Patch Set 6: Code-Review-1

(2 comments)

Patchset:

PS6: 
Selection of CHROMEOS seems unwarranted and should be explained in detail.

File src/mainboard/intel/shadowmountain/Kconfig:

https://review.coreboot.org/c/coreboot/+/49479/comment/0aba4582_3232a7cc 
PS5, Line 24: default y
> @angel, This should never be disabled for this mainboard and i also verified that disabling it doesn […]

If that is true, this is the first board that requires CHROMEOS
selected. Can you please explain what makes this board special
wrt. CHROMEOS? What doesn't work as expected without it selected?