Change in coreboot[master]: KGPE-D16: Add minimal source from 4.11_branch as a base for C bootblock

[Michał Żygowski (Code Review)]

Attention is currently required from: Nico Huber, Paul Menzel, Elyes Haouas.
Michał Żygowski has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62070 )

Change subject: KGPE-D16: Add minimal source from 4.11_branch as a base for C bootblock
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Patch Set 5:

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/62070/comment/2200fee7_3ac16d5b 
PS4, Line 11: Onyl necessary chanegs were introduces to make lint happy.
> Some typos: […]

Done

File src/southbridge/amd/sr5650/Kconfig:

https://review.coreboot.org/c/coreboot/+/62070/comment/5dabdfab_900db690 
PS3, Line 4: ## Copyright (C) 2010 Advanced Micro Devices, Inc.
> # SPDX-License-Identifier: GPL-2. […]

CB:62115 applies all SPDX headers if that's okay.