soc/intel/common: Add funtion to modify PAT & NXE bit

Add function to modify NXE bit & PAT.

BUG=None
BRANCH=None
TEST=Make sure build for Glkrvp is successful.

Change-Id: I265d6d5ca538496934a375eb8d99d52879522051
Signed-off-by: Naresh G Solanki <naresh.solanki@intel.com>
Reviewed-on: https://review.coreboot.org/25480
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
3 files changed