soc/intel/cannonlake: Add bootblock PCH

Add essential initialization needed for PCH in bootblock.

Change-Id: I3694e099e78c2989f7192c550cbba098e5df2032
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/20067
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
7 files changed