Change in edk2[coreboot-stable202108]: MdeModulePkg: load boot logo into BGRT table

[Matt DeVillier (Code Review)]

Attention is currently required from: Matt DeVillier.
Hello build bot (Jenkins),

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

https://review.coreboot.org/c/edk2/+/58786

to look at the new patch set (#3).

Change subject: MdeModulePkg: load boot logo into BGRT table
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MdeModulePkg: load boot logo into BGRT table

This is a shoehorned-in implementation of an ACPI BGRT
table, ported pretty much directly from the version used
under CorebootPayloadPkg, which itself was adapted from
an older version of HackBGRT[1].

EDK2 provides a facility to do this already, but it assumes
the ACPI tables already exist as EFI structures, so would need
to write code to populate those using the tables already in RAM
created by coreboot. This seemed like the easier option ATM.

[1] https://github.com/Metabolix/HackBGRT

Signed-off-by: Matt DeVillier 
Change-Id: I726fd7a9deb9ba5f8e351ce24834fc627acc4542
---
M MdeModulePkg/Include/Library/BootLogoLib.h
A MdeModulePkg/Library/BootLogoLib/Bgrt.c
M MdeModulePkg/Library/BootLogoLib/BootLogoLib.inf
M MdeModulePkg/MdeModulePkg.dec
M UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManager.c
M UefiPayloadPkg/UefiPayloadPkg.fdf
6 files changed, 311 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/edk2 refs/changes/86/58786/3