vendorcode/amd/opensil: Implement cbmem_top_chipset

Use an xPRF call to get the top of lower DRAM.

Organize Makefile to keep romstage/ramstage components separate.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Signed-off-by: Martin Roth <gaumless@gmail.com>
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I269663414f4d8e39eb218cd6348bfce7989a79f9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76513
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Varshit Pandya <pandyavarshit@gmail.com>

0 files changed, 0 insertions, 0 deletions