regulator: pf9453: Respect IRQ trigger settings from firmware

The datasheet specifies, that the IRQ_B pin is pulled low when any
unmasked interrupt bit status is changed, and it is released high once
the application processor reads the INT1 register. As it specifies a
level-low behavior, it should not force a falling-edge interrupt.

Remove the IRQF_TRIGGER_FALLING to not force the falling-edge interrupt
and instead rely on the flag from the device tree.

Fixes: 0959b6706325 ("regulator: pf9453: add PMIC PF9453 support")
Cc: [e-mail]
Signed-off-by: Franz Schnyder <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/pf9453-regulator.c

···
 	}
 
 	ret = devm_request_threaded_irq(pf9453->dev, pf9453->irq, NULL, pf9453_irq_handler,
-					(IRQF_TRIGGER_FALLING | IRQF_ONESHOT),
+					IRQF_ONESHOT,
 					"pf9453-irq", pf9453);
 	if (ret)
 		return dev_err_probe(pf9453->dev, ret, "Failed to request IRQ: %d\n", pf9453->irq);