soc/intel/cannonlake: Add SaGv value definition

SaGv(Sytem Agent Dynamic Frequency) have four settings, disabled,
disabled but running at fixed lower frequency, disabled but running at
fixed middle frquency, disabled but running at fixed high frequency and
totally enabled.

BUG=None.

Change-Id: Ib5fb648179e7889aaa64d91e6cf7a7a7503f4225
Signed-off-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-on: https://review.coreboot.org/25116
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed