dt-bindings: input: cros-ec-keyboard: Add keyboard matrix v3.0

Add support for keyboard matrix version 3.0, which reduces keyboard
ghosting.

Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://lore.kernel.org/r/9ae4d96cc2ce8c9de8755b9beffb78c641100fe7.1719531519.git.dnojiri@chromium.org


Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>