daisy*: Probe for EC via cros_ec first

This brings Skate and Spring up to speed with Snow with regards
to communicating with the EC via cros_ec instead of raw I2C interface
if available.

BUG=chromium:399467,chromium:455537
BRANCH=none
TEST=tested on Spring, mosys correctly identifies platform when
running R41 (6680.17.0) and can obtain EC info via "mosys ec info"

Signed-off-by: David Hendricks <dhendrix@chromium.org>
Change-Id: I8a82f97bbed22211f987046f9c8f7d610b4e1a0f
Reviewed-on: https://chromium-review.googlesource.com/247300
Reviewed-by: Shawn N <shawnn@chromium.org>
2 files changed