usb: common: usb-conn-gpio: switch psy_cfg from of_node to fwnode

In order to remove .of_node from the power_supply_config struct,
use .fwnode instead.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20250225-psy-core-convert-to-fwnode-v1-3-d5e4369936bb@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: sre

drivers/usb/common/usb-conn-gpio.c

@@ -158,7 +158,7 @@ static int usb_conn_psy_register(struct usb_conn_info *info)
 	struct device *dev = info->dev;
 	struct power_supply_desc *desc = &info->desc;
 	struct power_supply_config cfg = {
-		.of_node = dev->of_node,
+		.fwnode = dev_fwnode(dev),
 	};
 
 	desc->name = "usb-charger";