[S] Change in coreboot[main]: cpu/intel/model_206ax: Allow turbo boost ratio limit configuration

[Angel Pons (Code Review)]

Attention is currently required from: Anastasios Koutian.

Angel Pons has posted comments on this change by Anastasios Koutian. ( https://review.coreboot.org/c/coreboot/+/83271?usp=email )

Change subject: cpu/intel/model_206ax: Allow turbo boost ratio limit configuration
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Patch Set 2:

(2 comments)

Patchset:

PS2: 
Also see CB:42547 which admittedly I haven't really taken care of.

Commit Message:

https://review.coreboot.org/c/coreboot/+/83271/comment/badb8fe0_42df4d8c?usp... :
PS2, Line 9: Tested on ThinkPad T420 with the i7-3940XM.
Hmmm, I don't see any changes to the T420. If these settings are meant to be user-configurable, perhaps they should be Kconfig options and/or CMOS options.

The option API's "get" functions take a fallback value as parameter, which is returned when the selected option backend fails to read the option's value (the "null" backend always fails). This fallback value can be a Kconfig option, so a common pattern is the following:

```
const unsigned int some_value = get_uint_option("some_option", CONFIG_SOME_OPTION);
```