Update Cannonlake FSP header to version 7.x.2A.20, the following changes were made: 1. Add MemtestonWarmBoot option. 2. Add enable8254clockgatingonS3 option. 3. Default disable Tccoffsetlock BUG=None TEST=None Change-Id: Ie794960f0253b2a6dbd55ffda973756d15e35c01 Signed-off-by: Lijian Zhao <lijian.zhao@intel.com> Reviewed-on: https://review.coreboot.org/25289 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Caveh Jalali <caveh@google.com> Reviewed-by: Nick Vaccaro <nvaccaro@google.com>