pinctrl/pistachio: Prepare pistachio_gpio_irq_handler for irq argument removal

The irq argument of most interrupt flow handlers is unused or merily
used instead of a local variable. The handlers which need the irq
argument can retrieve the irq number from the irq descriptor.

Search and update was done with coccinelle and the invaluable help of
Julia Lawall.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org

drivers/pinctrl/pinctrl-pistachio.c

@@ -1310,9 +1310,11 @@ static int pistachio_gpio_irq_set_type(struct irq_data *data, unsigned int type)
 	return 0;
 }
 
-static void pistachio_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+static void pistachio_gpio_irq_handler(unsigned int __irq,
+				       struct irq_desc *desc)
 {
-	struct gpio_chip *gc = irq_get_handler_data(irq);
+	unsigned int irq = irq_desc_get_irq(desc);
+	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
 	struct pistachio_gpio_bank *bank = gc_to_bank(gc);
 	struct irq_chip *chip = irq_get_chip(irq);
 	unsigned long pending;