[ARM] ixp4xx: fix IRQ GPIO direction configuration for GPIOs >= 8

I believe that the following patch is necessary to properly configure
GPIO line configuration for IRQ's which are mapped to a GPIO line >= 8
(without this patch the wrong GPIO is configured as an input.)

Signed-off-by: Tim Harvey <[e-mail]>
Signed-off-by: Lennert Buytenhek <[e-mail]>
Signed-off-by: Russell King <[e-mail]>

arch/arm/mach-ixp4xx/common.c

···
 	*int_reg |= (int_style << (line * IXP4XX_GPIO_STYLE_SIZE));
 
 	/* Configure the line as an input */
-	gpio_line_config(line, IXP4XX_GPIO_IN);
+	gpio_line_config(irq2gpio[irq], IXP4XX_GPIO_IN);
 
 	return 0;
 }