pinctrl/at91: Don't provide a default trigger type

at91 used to set a default trigger type for GPIO interrupts in
order to cope with the old board files. These days are long gone,
and it all gets probed through DT.

Andras Szemzo reported that the Ethernet device on his board was
bailing to be probed, due to a conflict in interrupt trigger.
Surely enough, this is due to this default trigger still being
present, and turning this into a IRQ_TYPE_NONE fixes the issue.

Reported-by: Andras Szemzo <[email protected]>
Tested-by: Andras Szemzo <[email protected]>
Cc: Linus Walleij <[email protected]>
Cc: Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Acked-by: Nicolas Ferre <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>

drivers/pinctrl/pinctrl-at91.c

@@ -1614,7 +1614,7 @@ static int at91_gpio_of_irq_setup(struct platform_device *pdev,
 				   &gpio_irqchip,
 				   0,
 				   handle_edge_irq,
-				   IRQ_TYPE_EDGE_BOTH);
+				   IRQ_TYPE_NONE);
 	if (ret) {
 		dev_err(&pdev->dev, "at91_gpio.%d: Couldn't add irqchip to gpiochip.\n",
 			at91_gpio->pioc_idx);