Relying on the driver to round in one direction or the other is not
reliable.

Change-Id: Ide96864607ee6a22d2523544d6cfe8fae3116fcd
Reviewed-on: https://chromium-review.googlesource.com/288289Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>