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

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 <geert+renesas@glider.be>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/865e5274cc516d8c345048330a46e753e2bda677.1752086656.git.geert+renesas@glider.be