usb: typec: tcpm: reset the port on removal

If a port is unregistered, all the devices attached to it
must be unregistered as well. This will also make sure VBUS
and VCONN are disabled.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>