intel/common/systemagent: Add API to get SOC specific PRMRR base and mask

Implement weak definition and SOC specific code would implement
actual definition.

Change-Id: I5e787a2603aaa475cb5c61558cc31ec0afcb4a8b
Signed-off-by: Pratik Prajapati <pratikkumar.v.prajapati@intel.com>
Reviewed-on: https://review.coreboot.org/21243
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2 files changed