Change in coreboot[master]: drivers/intel/fsp2_0: Add support for FSP runs in long mode (x86_64)

[Subrata Banik (Code Review)]

Attention is currently required from: Subrata Banik, Andrey Petrov, Patrick Rudolph.
Hello build bot (Jenkins), Andrey Petrov, Patrick Rudolph,

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

https://review.coreboot.org/c/coreboot/+/59744

to look at the new patch set (#5).

Change subject: drivers/intel/fsp2_0: Add support for FSP runs in long mode (x86_64)
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drivers/intel/fsp2_0: Add support for FSP runs in long mode (x86_64)

Add new Kconfig `PLATFORM_USES_FSP2_X86_64` to mark FSP binarycapable of
running in x86_64 mode. Fix the compilation issue by adding required FSP
headers to make the code compiled with`HAVE_EXP_X86_64_SUPPORT` Kconfig
enabled.

TEST=Verified on Intel Alder Lake with experimental 64-bit support FSP.

Change-Id: If12b63a282c660da6f57fe23b0b848e2d155853f
Signed-off-by: Subrata Banik 
---
M src/drivers/intel/fsp2_0/Kconfig
M src/drivers/intel/fsp2_0/include/fsp/info_header.h
M src/vendorcode/intel/edk2/UDK2017/IntelFsp2Pkg/Include/FspEas/FspApi.h
M src/vendorcode/intel/edk2/edk2-stable202005/IntelFsp2Pkg/Include/FspEas/FspApi.h
4 files changed, 105 insertions(+), 5 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/44/59744/5