soc/intel/common: Add function to get soc reserved memory size

This patch ensures to consider soc reserved memory size while
allocating DRAM based resources.

Change-Id: I587a9c1ea44f2dbf67099fef03d0ff92bc44f242
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/21539
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2 files changed