usb: typec: ucsi: properly register partner's PD device

Use typec_partner_usb_power_delivery_register() to register PD device
for Type-C partner so that the PD device is nested under the partner's
device in sysfs.

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240329-qcom-ucsi-fixes-v2-3-0f5d37ed04db@linaro.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>