kirkwood/orion: fix orion_gpio_set_blink

gpio registers are for 32 gpios. Given that orion_gpio_set_blink is called
directly and not through gpiolib, it needs to make sure that the pin value
given to the internal functions are between 0 and 31.
Signed-off-by: NArnaud Patard <arnaud.patard@rtp-net.org>
Tested-By: NAdam Baker <linux@baker-net.org.uk>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

arch/arm/plat-orion/gpio.c

@@ -289,8 +289,8 @@ void orion_gpio_set_blink(unsigned pin, int blink)
 		return;
 
 	spin_lock_irqsave(&ochip->lock, flags);
-	__set_level(ochip, pin, 0);
-	__set_blinking(ochip, pin, blink);
+	__set_level(ochip, pin & 31, 0);
+	__set_blinking(ochip, pin & 31, blink);
 	spin_unlock_irqrestore(&ochip->lock, flags);
 }
 EXPORT_SYMBOL(orion_gpio_set_blink);