soc/intel/cannonlake: Remove unused systemagent registers

This patch to make code cleaner and remove unused systemagent
register macros. [same as KBL implementation]

Change-Id: I13b9c83097fc98183ea138c9087b5fc7834efd58
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/20942
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed