Add support for snow 2.0 model

Reuse the EVT Elpida GPIO strappings for MP2.0.

BUG=chrome-os-partner:22583
TEST=mosys platform version (returns MP2)
mosys memory spd print all (returns x16 memory info)

Change-Id: Ifc407ccbbbe5f2f381a0a1e5db2f6fedf0a376aa
Reviewed-on: https://chromium-review.googlesource.com/170485
Reviewed-by: Doug Anderson <dianders@chromium.org>
Commit-Queue: Katie Roberts-Hoffman <katierh@chromium.org>
Tested-by: Katie Roberts-Hoffman <katierh@chromium.org>
(cherry picked from commit a131e03db3db3e336881dd11c05824f9010e8fde)
Reviewed-on: https://chromium-review.googlesource.com/171572
4 files changed