Change in coreboot[master]: coreboot_tables.c: Expose the ACPI RSDP

[Arthur Heymans (Code Review)]

Attention is currently required from: Arthur Heymans, Lance Zhao, Tim Wawrzynczak, Julius Werner.
Hello Lance Zhao, build bot (Jenkins), Nico Huber, Tim Wawrzynczak, Julius Werner, Arthur Heymans,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/62573

to look at the new patch set (#4).

Change subject: coreboot_tables.c: Expose the ACPI RSDP
......................................................................

coreboot_tables.c: Expose the ACPI RSDP

The ACPI RSDP can only be found in:
- legacy BIOS region
- via UEFI service

On some systems like ARM that legacy BIOS region is not an option, so
to avoid needing UEFI it makes sense to expose the RSDP via a coreboot
table entry.

This also adds the respective unit test.

Change-Id: I591312a2c48f0cbbb03b2787e4b365e9c932afff
Signed-off-by: Arthur Heymans 
---
M src/acpi/acpi.c
M src/commonlib/include/commonlib/coreboot_tables.h
M src/include/acpi/acpi.h
M src/lib/coreboot_table.c
M tests/lib/coreboot_table-test.c
5 files changed, 47 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/73/62573/4