platform/x86: intel_cht_int33fe: Replacing the old connections with references

Replacing the old connection descriptions with software node
references. Supplying the USB connector also a reference to
the DisplayPort while at it.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>