avr32: minor GPIO handling updates

On the odd chance some code uses a pin as a GPIO IRQ without calling
gpio_request() or gpio_direction_input(), the debug dump should still
show its pin status.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com>

arch/avr32/mach-at32ap/pio.c

@@ -318,6 +318,8 @@ static void pio_bank_show(struct seq_file *s, struct gpio_chip *chip)
 		const char *label;
 
 		label = gpiochip_is_requested(chip, i);
+		if (!label && (imr & mask))
+			label = "[irq]";
 		if (!label)
 			continue;