irqchip/renesas-intc-irqpin: Convert to DEFINE_SIMPLE_DEV_PM_OPS()

Convert the Renesas INTC External IRQ Pin driver from SIMPLE_DEV_PM_OPS()
to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr(). This allows to drop the
__maybe_unused annotations from its suspend callbacks, and reduces kernel
size in case CONFIG_PM or CONFIG_PM_SLEEP is disabled.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Link: https://lore.kernel.org/all/865e5[e-mail]

drivers/irqchip/irq-renesas-intc-irqpin.c

···
 	pm_runtime_disable(&pdev->dev);
 }
 
-static int __maybe_unused intc_irqpin_suspend(struct device *dev)
+static int intc_irqpin_suspend(struct device *dev)
 {
 	struct intc_irqpin_priv *p = dev_get_drvdata(dev);
 
···
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(intc_irqpin_pm_ops, intc_irqpin_suspend, NULL);
+static DEFINE_SIMPLE_DEV_PM_OPS(intc_irqpin_pm_ops, intc_irqpin_suspend, NULL);
 
 static struct platform_driver intc_irqpin_device_driver = {
 	.probe		= intc_irqpin_probe,
···
 	.driver		= {
 		.name		= "renesas_intc_irqpin",
 		.of_match_table	= intc_irqpin_dt_ids,
-		.pm		= &intc_irqpin_pm_ops,
+		.pm		= pm_sleep_ptr(&intc_irqpin_pm_ops),
 	}
 };