spd: Fix ddr_freq enum name

The DDR4-2400* standard has a data rate of 2400 MT/s and I/O clock of
1200 MHz. The corresponding ddr_freq enum name should be DDR_1200.

BUG=none
TEST=build mosys

Change-Id: I071959d04a24289eeef31d2e38ded1abe1ef9538
Reviewed-on: https://chromium-review.googlesource.com/1577326
Commit-Ready: Philip Chen <philipchen@chromium.org>
Tested-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
3 files changed