power: supply: core: remove of_node from power_supply_config

All drivers have been migrated from .of_node to .fwnode,
so let's kill the former.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20250430-psy-core-convert-to-fwnode-v2-2-f9643b958677@collabora.com
Reviewed-by: Hans de Goede <hansg@kernel.org>
Signed-off-by: Hans de Goede <hansg@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

Author: sre

drivers/power/supply/power_supply_core.c

@@ -1529,10 +1529,9 @@ __power_supply_register(struct device *parent,
 	dev_set_drvdata(dev, psy);
 	psy->desc = desc;
 	if (cfg) {
+		device_set_node(dev, cfg->fwnode);
 		dev->groups = cfg->attr_grp;
 		psy->drv_data = cfg->drv_data;
-		dev->of_node =
-			cfg->fwnode ? to_of_node(cfg->fwnode) : cfg->of_node;
 		psy->supplied_to = cfg->supplied_to;
 		psy->num_supplicants = cfg->num_supplicants;
 	}

include/linux/power_supply.h

@@ -232,7 +232,6 @@ struct power_supply;
 
 /* Run-time specific power supply configuration */
 struct power_supply_config {
-	struct device_node *of_node;
 	struct fwnode_handle *fwnode;
 
 	/* Driver private data */