usb: typec: tps6598x: Fix return value check in tps6598x_probe()

In case of error, the function device_get_named_child_node() returns
NULL pointer not ERR_PTR(). The IS_ERR() test in the return value check
should be replaced with NULL test.

Fixes: 18a6c866bb19 ("usb: typec: tps6598x: Add USB role switching logic")
Reported-by: Hulk Robot <[e-mail]>
Reviewed-by: Heikki Krogerus <[e-mail]>
Signed-off-by: Wei Yongjun <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/typec/tps6598x.c

···
 		return ret;
 
 	fwnode = device_get_named_child_node(&client->dev, "connector");
-	if (IS_ERR(fwnode))
-		return PTR_ERR(fwnode);
+	if (!fwnode)
+		return -ENODEV;
 
 	tps->role_sw = fwnode_usb_role_switch_get(fwnode);
 	if (IS_ERR(tps->role_sw)) {