[L] Change in coreboot[main]: payloads/libpayload: Implement support for UPL handoff

[Benjamin Doron (Code Review)]

Attention is currently required from: Maximilian Brune.

Hello Maximilian Brune, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/84797?usp=email

to look at the new patch set (#2).

Change subject: payloads/libpayload: Implement support for UPL handoff
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payloads/libpayload: Implement support for UPL handoff

Change-Id: I0caa0cf5ef432c7e4b898931a8a0bd6c72b1e665
Signed-off-by: Maximilian Brune 
Signed-off-by: Benjamin Doron 
---
M payloads/libpayload/Kconfig
M payloads/libpayload/arch/arm/coreboot.c
M payloads/libpayload/arch/arm64/coreboot.c
M payloads/libpayload/arch/x86/coreboot.c
M payloads/libpayload/include/sysinfo.h
M payloads/libpayload/libc/Makefile.mk
A payloads/libpayload/libc/upl_fdt.c
7 files changed, 268 insertions(+), 9 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/97/84797/2