net: pse-pd: pse_core: Fix pse regulator type

Clarify PSE regulator as voltage regulator, not current.
The PSE (Power Sourcing Equipment) regulator is defined as a voltage
regulator, maintaining fixed voltage while accommodating varying current.

Fixes: d83e13761d5b ("net: pse-pd: Use regulator framework within PSE framework")
Reviewed-by: Andrew Lunn <[e-mail]>
Acked-by: Oleksij Rempel <[e-mail]>
Signed-off-by: Kory Maincent <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/pse-pd/pse_core.c

···
 	 */
 	rdesc->id = id;
 	rdesc->name = name;
-	rdesc->type = REGULATOR_CURRENT;
+	rdesc->type = REGULATOR_VOLTAGE;
 	rdesc->ops = &pse_pi_ops;
 	rdesc->owner = pcdev->owner;