daisy: use device tree compatible node for identification

This adds DT compatble node parsing as a way of identifying Snow.

BUG=chrome-os-partner:22683
BRANCH=none
TEST=Tested on Snow with a new kernel

Change-Id: Ia055346870761663866fd946bb7294d116771998
Reviewed-on: https://chromium-review.googlesource.com/169377
Commit-Queue: David Hendrix <dhendrix@chromium.org>
Tested-by: David Hendrix <dhendrix@chromium.org>
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>
1 file changed