soc/intel/common/block: Move p2sb common functions into block/p2sb

This patch cleans soc/intel/{apollolake/cannonlake/skylake} by moving
common soc code into common/block/p2sb.

BUG=b:78109109
BRANCH=none
TEST=Build and boot KBL/CNL/APL platform.

Change-Id: Ie9fd933d155b3fcd0d616b41cdf042cefe2c649a
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/26132
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
16 files changed