mb/google/poppy/variants/atlas: add SPD for new samsung 4GB memory

This adds a new SPD entry for samsung's new 4GB memory and updates
atlas to use it instead of the previous gen memory.

TEST=booted on atlas

Change-Id: I19567736c45a1321586378c3d964c2cbebe24755
Signed-off-by: Caveh Jalali <caveh@chromium.org>
Reviewed-on: https://review.coreboot.org/26185
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
2 files changed