Change in coreboot[master]: payloads/Tianocore: Update default build target, simplify build options

[Matt DeVillier (Code Review)]

Attention is currently required from: Martin Roth, Matt DeVillier, Stefan Reinauer, Angel Pons.
Hello build bot (Jenkins), Martin Roth, Stefan Reinauer, Angel Pons, Arthur Heymans,

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

https://review.coreboot.org/c/coreboot/+/54019

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

Change subject: payloads/Tianocore: Update default build target, simplify build options
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payloads/Tianocore: Update default build target, simplify build options

Drop the deprecated COREBOOTPAYLOAD option, and replace it with MrChromebox's
updated UefiPayloadPkg option. Simplify the Kconfig options to make it easier
to build from upstream edk2 master. Drop the TIANOCORE_USE_8254_TIMER Kconfig
option since it applied only to CorebootPayloadPkg. Clean up the Makefile now
that we're only building from a single Tianocore package/target.

Test: build/boot qemu Q35 target with both UefiPayload and Upstream options.

Change-Id: If545fbd0c30be6dcc6ff43107b80980fa23a527e
Signed-off-by: Matt DeVillier 
---
M Documentation/payloads.md
M payloads/external/Makefile.inc
M payloads/external/tianocore/Kconfig
M payloads/external/tianocore/Makefile
4 files changed, 24 insertions(+), 41 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/19/54019/2