leds: leds-pca955x: Use dev_info instead of printk

Fixes the following checkpatch warning:
WARNING: Prefer netdev_info(netdev, ... then dev_info(dev, ...
then pr_info(...  to printk(KERN_INFO ...
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

drivers/leds/leds-pca955x.c

@@ -277,7 +277,7 @@ static int __devinit pca955x_probe(struct i2c_client *client,
 		return -ENODEV;
 	}
 
-	printk(KERN_INFO "leds-pca955x: Using %s %d-bit LED driver at "
+	dev_info(&client->dev, "leds-pca955x: Using %s %d-bit LED driver at "
 			"slave address 0x%02x\n",
 			id->name, chip->bits, client->addr);