Change in ...coreboot[master]: cpu/intel/sandybridge: Add `hyper_threading` option

[Nico Huber (Code Review)]

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/29669 )

Change subject: cpu/intel/sandybridge: Add `hyper_threading` option
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Patch Set 2:
> > > Can we make this a common intel cpu change with an interface for multiple cpu implementations.
> >
> > You mean if this code works for other platforms?
>
> I vagely recal a discussion on irc where it was said that all Intel platforms starting from sandybridge have the same interface? A common implementation would be nice, which probably easier and cleaner with a C_ENVIRONMENT_BOOTBLOCK implementation.

I've checked the documentation, it's the same for Haswell and
Broadwell too. For newer platforms, it has to be handled by
or coordinated with the blob, I guess.

If anyone wants to take this over, I wouldn't mind. I don't
have time for this atm and consider it low priority (should
actually be handled by the OS, IMHO).