glados: Disable HS200 on the eMMC

Disable HS200 on the eMMC because it is not reliable with all
of the possible eMMC devices.

BUG=chrome-os-partner:43534
BRANCH=none
TEST=boon on glados p2

Change-Id: I8bdf5b227aa0c6e392cff8d2ed6b09e7132a68a2
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/293540
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed