All ChromeOS ARM devices that have the standard "CrOS EC" have the
same keyboard mapping. It's silly to include this same definition
everywhere. Let's create a "dtsi" fragment that we can include from
many different boards.
This fragment is based on what's currently in tegra124-venice2.dts
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>