spd: remove ddr_freq field from nonspd modules

Nothing uses this field, we can remove it.

BUG=chromium:990438
TEST="mosys memory spd print all" on volteer

Change-Id: Ib173b14be13937934f582439ab03c4947e4d97c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/mosys/+/2787283
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Rob Barnes <robbarnes@google.com>
Reviewed-by: Rob Barnes <robbarnes@google.com>
4 files changed