[coreboot-gerrit] Change in coreboot[master]: mb/intel/shadowmountain: Add the ramstage code

[Patrick Georgi (Code Review)]

Attention is currently required from: V Sowmya, Martin Roth, Tim Wawrzynczak, Balaji Manigandan, Aamir Bohra.
Patrick Georgi has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/49732 )

Change subject: mb/intel/shadowmountain: Add the ramstage code
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Patch Set 9: Code-Review+2