pinctrl: at91-pio4: fix domain name assignment

Since commit d59f661 ("genirq: Allow fwnode to carry name
information only") an IRQ domain is always given a name during
allocation (e.g. used for the debugfs entry).

Drop the no longer valid name assignment, which would lead to an attempt
to free a string constant when removing the domain on late probe
failures (e.g. probe deferral).

Fixes: d59f661 ("genirq: Allow fwnode to carry name information only")
Cc: stable@vger.kernel.org	# 4.13
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Tested-by: Claudiu Beznea <claudiu.beznea@microchip.com> # on SAMA7G5
Link: https://lore.kernel.org/r/20230224130828.27985-1-johan+linaro@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: jhovold

drivers/pinctrl/pinctrl-at91-pio4.c

@@ -1206,7 +1206,6 @@ static int atmel_pinctrl_probe(struct platform_device *pdev)
 		dev_err(dev, "can't add the irq domain\n");
 		return -ENODEV;
 	}
-	atmel_pioctrl->irq_domain->name = "atmel gpio";
 
 	for (i = 0; i < atmel_pioctrl->npins; i++) {
 		int irq = irq_create_mapping(atmel_pioctrl->irq_domain, i);