HID: google: Add of_match table to Whiskers switch device.

Add a device tree match table for "cros-cbas" switch device.

Signed-off-by: Ikjoon Jang <ikjn@chromium.org>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>