mb/google/volteer: add support for ddr4 memory

Add new ddr_memory_cfg structure to support both DDR4 and LPDDR4x
memory types.

Change existing variant code to use the new meminit_ddr() call
instead of calling meminit_lpddr4x() directly.

BUG=b:161772961
TEST='emerge-volteer coreboot chromeos-bootimage' and verify that
volteer still boots.  NOTE that this only tests the lpddr4 side
of the implementation as I do not have a DDR4 board to test this on.

Change-Id: Id4bca2bfa97530f0d04a0e8d90f01b8281d2aea6
Signed-off-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44250
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Caveh Jalali <caveh@chromium.org>

0 files changed, 0 insertions, 0 deletions