mosys: Support new DRAM for Gale

Support 3 new DRAM types for Gale which can be
distinguish by board id.

BUG=b:35583701
TEST=build mosys and test with reworked Gale
Change-Id: I06c15b510178869f8c6c4f16513600ff5ce9144a
Reviewed-on: https://chromium-review.googlesource.com/1297527
Commit-Ready: Zheng Pan <zhengpan@chromium.org>
Tested-by: Zheng Pan <zhengpan@chromium.org>
Reviewed-by: Zhihong Yu <zhihongyu@chromium.org>
3 files changed