[M] Change in coreboot[main]: vendorcode/amd/opensil: Add initial setup and API calls

[Varshit Pandya (Code Review)]

Attention is currently required from: Arthur Heymans, Martin L Roth.

Varshit Pandya has uploaded a new patch set (#7) to the change originally created by Arthur Heymans. ( https://review.coreboot.org/c/coreboot/+/76515?usp=email )

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

Change subject: vendorcode/amd/opensil: Add initial setup and API calls
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vendorcode/amd/opensil: Add initial setup and API calls

- First a console is set up for opensil.
- After that a region in CBMEM is reserved and passed to opensil which
will use it as a buffer for input/output information.
- Finally opensil is called and the return value handled.

Signed-off-by: Arthur Heymans 
Change-Id: I4833a5a86034a13e6be102a6b68c3bb54108bc9a
---
M src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h
M src/vendorcode/amd/opensil/genoa_poc/Makefile.inc
A src/vendorcode/amd/opensil/genoa_poc/ramstage.c
3 files changed, 92 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/15/76515/7