Change in coreboot[master]: cbfs: Pull handling of the CBFS_CACHE mem_pool into CBFS core

[Julius Werner (Code Review)]

Attention is currently required from: Martin Roth, Philipp Hug, Furquan Shaikh, ron minnich.
Hello build bot (Jenkins), Patrick Georgi, Martin Roth, Philipp Hug, Furquan Shaikh, Aaron Durbin, ron minnich,

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

https://review.coreboot.org/c/coreboot/+/49333

to look at the new patch set (#13).

Change subject: cbfs: Pull handling of the CBFS_CACHE mem_pool into CBFS core
......................................................................

cbfs: Pull handling of the CBFS_CACHE mem_pool into CBFS core

This patch pulls control of the memory pool serving allocations from the
CBFS_CACHE memlayout area into cbfs.c and makes it a core part of the
CBFS API. Previously, platforms would independently instantiate this as
part of boot_device_ro() (mostly through cbfs_spi.c). The new cbfs_cache
pool is exported as a global so these platforms can still use it to
directly back rdev_mmap() on their boot device, but the cbfs_cache can
now also use it to directly make allocations itself. This is used to
allow transparent decompression support in cbfs_map().

Signed-off-by: Julius Werner 
Change-Id: I0d52b6a8f582a81a19fd0fd663bb89eab55a49d9
---
M src/commonlib/Makefile.inc
M src/commonlib/include/commonlib/region.h
M src/commonlib/region.c
M src/drivers/spi/cbfs_spi.c
M src/include/cbfs.h
M src/include/symbols.h
M src/lib/cbfs.c
M src/mainboard/sifive/hifive-unleashed/media.c
M src/soc/samsung/exynos5250/spi.c
M src/soc/samsung/exynos5420/spi.c
10 files changed, 89 insertions(+), 49 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/33/49333/13