[M] Change in coreboot[master]: libpayload: Outsource delay function into own header

[Thomas Heijligen (Code Review)]

Attention is currently required from: Nico Huber, Thomas Heijligen.

Hello build bot (Jenkins), Nico Huber, Julius Werner,

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

https://review.coreboot.org/c/coreboot/+/70139

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

Change subject: libpayload: Outsource delay function into own header
......................................................................

libpayload: Outsource delay function into own header

For libflashrom we need the delay functions but when including the whole
libpayload.h it has conflicting symbols.

Change-Id: I6e4a669b8ba25836fb870d74c200985c1bfdb387
Signed-off-by: Thomas Heijligen 
---
M payloads/libpayload/include/libpayload.h
A payloads/libpayload/include/libpayload/delay.h
M payloads/libpayload/include/stddef.h
3 files changed, 73 insertions(+), 49 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/39/70139/4