platform/chrome: cros_ec_typec: Add struct for port data

Add a separate struct for storing port data, including Type C connector
class struct pointers and caps.

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>