gpio: visconti: Replace of_node_to_fwnode() with more suitable API

of_node_to_fwnode() is a IRQ domain specific implementation of
of_fwnode_handle(). Replace the former with more suitable API.

Signed-off-by: Andy Shevchenko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bartosz Golaszewski <[e-mail]>

drivers/gpio/gpio-visconti.c

···
  * Nobuhiro Iwamatsu <[e-mail]>
  */
 
+#include <linux/bitops.h>
 #include <linux/gpio/driver.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
···
 #include <linux/io.h>
 #include <linux/of_irq.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/seq_file.h>
-#include <linux/bitops.h>
 
 /* register offset */
 #define GPIO_DIR	0x00
···
 
 	girq = &priv->gpio_chip.irq;
 	gpio_irq_chip_set_chip(girq, &visconti_gpio_irq_chip);
-	girq->fwnode = of_node_to_fwnode(dev->of_node);
+	girq->fwnode = dev_fwnode(dev);
 	girq->parent_domain = parent;
 	girq->child_to_parent_hwirq = visconti_gpio_child_to_parent_hwirq;
 	girq->populate_parent_alloc_arg = visconti_gpio_populate_parent_fwspec;