Add support for SMBIOS memory HOB save.
Add DIMM 'part_num' info to be saved as part of SMBIOS memory HOB.
BUG=chrome-os-partner:55505
TEST='dmidecode -t 17' and 'mosys -k memory spd print all'
Change-Id: I53b4a578f31c93b8921dea373842b8d998127508
Signed-off-by: Ravi Sarawadi <ravishankar.sarawadi@intel.com>
Reviewed-on: https://review.coreboot.org/16249
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>