misc: Use dev_fwnode()

irq_domain_create_simple() takes fwnode as the first argument. It can be
extracted from the struct device using dev_fwnode() helper instead of
using of_node with of_fwnode_handle().

So use the dev_fwnode() helper.

Signed-off-by: "Jiri Slaby (SUSE)" <[e-mail]>
Cc: Arnd Bergmann <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/misc/hi6421v600-irq.c

···
 static int hi6421v600_irq_probe(struct platform_device *pdev)
 {
 	struct device *pmic_dev = pdev->dev.parent;
-	struct device_node *np = pmic_dev->of_node;
 	struct platform_device *pmic_pdev;
 	struct device *dev = &pdev->dev;
 	struct hi6421v600_irq *priv;
···
 	if (!priv->irqs)
 		return -ENOMEM;
 
-	priv->domain = irq_domain_create_simple(of_fwnode_handle(np),
-						PMIC_IRQ_LIST_MAX, 0,
+	priv->domain = irq_domain_create_simple(dev_fwnode(pmic_dev), PMIC_IRQ_LIST_MAX, 0,
 						&hi6421v600_domain_ops, priv);
 	if (!priv->domain) {
 		dev_err(dev, "Failed to create IRQ domain\n");