mtd: orion_nand: use dev_err() instead of printk()

Use dev_err() instead of printk() to provide a better message
to userspace.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
diff --git a/drivers/mtd/nand/orion_nand.c b/drivers/mtd/nand/orion_nand.c
index a6a4a20..dd7fe81 100644
--- a/drivers/mtd/nand/orion_nand.c
+++ b/drivers/mtd/nand/orion_nand.c
@@ -100,7 +100,7 @@
 
 	io_base = ioremap(res->start, resource_size(res));
 	if (!io_base) {
-		printk(KERN_ERR "orion_nand: ioremap failed\n");
+		dev_err(&pdev->dev, "ioremap failed\n");
 		ret = -EIO;
 		goto no_res;
 	}