It does not change once a frequency has been set, so store it somewhere.
Since this changes the saved data definition, update MRC_CACHE_VERSION.
As SNB will eventually use the same code, only IVB is being refactored.
Change-Id: I25b7c394abab173241fffdf57ac5c929daad8257
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39786
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
48409b8229