rtc: mpfs: Use devm_pm_set_wake_irq

Use devm_pm_set_wake_irq, then the 'driver.remove()' could be cleaned up.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20250205-rtc-cleanup-v1-6-66165678e089@nxp.com


Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>