avr32: At32ap: pio fix typo "))" on gpio_irq_unmask prototype

introduce in commit d75f1bfdbccb

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Patrice Vilchez <patrice.vilchez@atmel.com>
Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>

arch/avr32/mach-at32ap/pio.c

@@ -257,7 +257,7 @@ static void gpio_irq_mask(struct irq_data *d)
 	pio_writel(pio, IDR, 1 << (gpio & 0x1f));
 }
 
-static void gpio_irq_unmask(struct irq_data *d))
+static void gpio_irq_unmask(struct irq_data *d)
 {
 	unsigned		gpio = irq_to_gpio(d->irq);
 	struct pio_device	*pio = &pio_dev[gpio >> 5];