Change in coreboot[master]: libpayload: Add boot_device_read() function

[Jakub Czapiga (Code Review)]

Attention is currently required from: Patrick Georgi, Jakub Czapiga.
Hello build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/59492

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

Change subject: libpayload: Add boot_device_read() function
......................................................................

libpayload: Add boot_device_read() function

This patch adds a new way of implementing flash access for libpayload.
Until now all reads had to be performed using cbfs_media, which is
obsolete. From now on all reads should be performed using
boot_device_read(). This patch also provides a fallback implementation
of this function using cbfs_media, but it will be removed in the future
together with cbfs_media API.

This patch also provides a default implementation of boot_device_read()
for x86 architecture.

Change-Id: I1babd2a8414ed9de3ca49903fcb4f036997b5ff3
Signed-off-by: Jakub Czapiga 
---
A payloads/libpayload/arch/x86/boot_media.c
A payloads/libpayload/include/boot_device.h
2 files changed, 39 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/92/59492/4