gpiolib: a gpio is unsigned, so use %u to print it

Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/gpio/gpiolib.c

@@ -753,7 +753,7 @@ int gpio_export(unsigned gpio, bool direction_may_change)
 		struct device	*dev;
 
 		dev = device_create(&gpio_class, desc->chip->dev, MKDEV(0, 0),
-				desc, ioname ? ioname : "gpio%d", gpio);
+				desc, ioname ? ioname : "gpio%u", gpio);
 		if (!IS_ERR(dev)) {
 			status = sysfs_create_group(&dev->kobj,
 						&gpio_attr_group);