[coreboot-gerrit] Change in coreboot[master]: mb/intel/shadowmountain: Add flash layout for shadowmountain

[Subrata Banik (Code Review)]

Attention is currently required from: V Sowmya, Sugnan Prabhu S, Tim Wawrzynczak, Balaji Manigandan, Aamir Bohra.
Subrata Banik has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/49478 )

Change subject: mb/intel/shadowmountain: Add flash layout for shadowmountain
......................................................................

Patch Set 2:

(1 comment)

File src/mainboard/intel/shadowmountain/chromeos.fmd:

https://review.coreboot.org/c/coreboot/+/49478/comment/4de755df_c5d9fc62 
PS1, Line 6: SI_BIOS@0x1400000 0xc00000 {
> There is no specific reason skip it and i used the same fmap from the adlrvp. […]

i think the idea is here to create 12MB BIOS region hence started from bottom alignment