mtd: sharpsl: 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/sharpsl.c b/drivers/mtd/nand/sharpsl.c
index 61a85ab..e81059b 100644
--- a/drivers/mtd/nand/sharpsl.c
+++ b/drivers/mtd/nand/sharpsl.c
@@ -134,7 +134,7 @@
 	/* map physical address */
 	sharpsl->io = ioremap(r->start, resource_size(r));
 	if (!sharpsl->io) {
-		printk("ioremap to access Sharp SL NAND chip failed\n");
+		dev_err(&pdev->dev, "ioremap to access Sharp SL NAND chip failed\n");
 		err = -EIO;
 		goto err_ioremap;
 	}