irqchip/renesas-irqc: Convert to DEFINE_SIMPLE_DEV_PM_OPS()

irqchip/renesas-irqc: Convert to DEFINE_SIMPLE_DEV_PM_OPS()

Convert the Renesas IRQC 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 callback, 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/5a14f9932da20ec46cde27f314414474072755ed.1752086718.git.geert+renesas@glider.be