Change in coreboot[master]: cbfs: Introduce and implement cbfs_load_async

[Raul Rangel (Code Review)]

Attention is currently required from: Furquan Shaikh, Marshall Dawson, Julius Werner.
Hello build bot (Jenkins), Furquan Shaikh, Marshall Dawson, Julius Werner,

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

https://review.coreboot.org/c/coreboot/+/56049

to look at the new patch set (#5).

Change subject: cbfs: Introduce and implement cbfs_load_async
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cbfs: Introduce and implement cbfs_load_async

This CL adds support for the Futures API to cbfs. This allows loading a
file from CBFS asynchronously. It currently only supports uncompressed
files. More APIs will be added as I start to load stages, oproms, etc
asynchronously.

BUG=b:179699789
TEST=Boot guybrush and see payload read/decompress drop by 23 ms.

Signed-off-by: Raul E Rangel 
Change-Id: Idf4cee8a7094a9470aff997e4b06e823cb4811c0
---
M src/include/cbfs.h
M src/lib/cbfs.c
2 files changed, 184 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/49/56049/5