gpio: siox: Switch to IRQ_TYPE_NONE

The siox driver is hardcoding a default type of
IRQ_TYPE_EDGE_RISING to the irq helper, but this should only
be applicable to old boardfiles and odd device tree irqchips
with just onecell irq (no flags). I doubt this is the case
with the siox, I think all consumers specify the flags they
use in the device tree.
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-siox.c

@@ -247,7 +247,7 @@ static int gpio_siox_probe(struct siox_device *sdevice)
 	}
 
 	ret = gpiochip_irqchip_add(&ddata->gchip, &ddata->ichip,
-				   0, handle_level_irq, IRQ_TYPE_EDGE_RISING);
+				   0, handle_level_irq, IRQ_TYPE_NONE);
 	if (ret)
 		dev_err(&sdevice->dev,
 			"Failed to register irq chip (%d)\n", ret);