mb/google/poppy/variants/nami: Add spd files

Add spd files for LPDDR3 based on info received from factory team.

BUG=b:73287172
BRANCH=None
TEST=None

Change-Id: I8924ce97ea422ef1e9a5becb5ea2fda3bf77d8cf
Signed-off-by: Shelley Chen <shchen@chromium.org>
Reviewed-on: https://review.coreboot.org/25001
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
6 files changed