Depthcharge: Enable eMMC HS200 to enhance boot time.

BRANCH=master
BUG=chrome-os-partner:34675
TEST=Build images run on Chrome OS devices and got ~12% BIOS boot
time enhancement.
Signed-off-by: Kenji Chen <kenji.chen@intel.com>

Change-Id: Ic9b4bdf4a5f933249c394ba58f29409b60bd4b66
Reviewed-on: https://chromium-review.googlesource.com/239136
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Commit-Queue: Kenji Chen <kenji.chen@intel.com>
Tested-by: Kenji Chen <kenji.chen@intel.com>
4 files changed