net: pse-pd: pd692x0: Expand ethtool status message

This update expands pd692x0_ethtool_get_status() callback with newly
introduced details such as the detected class, current power delivered,
and extended state information.

Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Link: https://patch.msgid.link/20240704-feature_poe_power_cap-v6-3-320003204264@bootlin.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>