[XS] Change in coreboot[main]: arch/x86/include/arch: Add feature check macros

[Paul Menzel (Code Review)]

Attention is currently required from: Arthur Heymans, Jincheng Li, Shuo Liu.

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/81133?usp=email )

Change subject: arch/x86/include/arch: Add feature check macros
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Patch Set 7:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/81133/comment/01723e5e_104b5ce9 :
PS7, Line 7: Add feature check macros
Maybe: Define feature check macros for MCE and MCA

https://review.coreboot.org/c/coreboot/+/81133/comment/a26404bd_8c536a83 :
PS7, Line 9: Add
Define

https://review.coreboot.org/c/coreboot/+/81133/comment/2fe6b047_a4afb808 :
PS7, Line 10: and MCA (machine check architecture)
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