Change in coreboot[master]: soc/intel/denverton_ns: Remove the open source CAR option

[Patrick Georgi (Code Review)]

Attention is currently required from: Arthur Heymans, Suresh Bellampalli, Vanessa Eusebio, Angel Pons, Michal Motyl, Patrick Rudolph.
Patrick Georgi has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55519 )

Change subject: soc/intel/denverton_ns: Remove the open source CAR option
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Patch Set 4:

(1 comment)

Patchset:

PS2:
> > I'd rather get rid of FSP-T instead. […]

maybe add a config EXPERIMENTAL somewhere and key on that? That way the code sticks around but isn't visible unless a user _really_ wants it.