[media] soc_camera/sh_mobile_csi2: Convert to devm_ioremap_resource()

Use the newly introduced devm_ioremap_resource() instead of
devm_request_and_ioremap() which provides more consistent error handling.
devm_ioremap_resource() provides its own error messages; so all explicit
error messages can be removed from the failure code paths.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/soc_camera/sh_mobile_csi2.c

@@ -9,6 +9,7 @@
  */
 
 #include <linux/delay.h>
+#include <linux/err.h>
 #include <linux/i2c.h>
 #include <linux/io.h>
 #include <linux/platform_device.h>
@@ -324,11 +325,9 @@ static int sh_csi2_probe(struct platform_device *pdev)
 
 	priv->irq = irq;
 
-	priv->base = devm_request_and_ioremap(&pdev->dev, res);
-	if (!priv->base) {
-		dev_err(&pdev->dev, "Unable to ioremap CSI2 registers.\n");
-		return -ENXIO;
-	}
+	priv->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(priv->base))
+		return PTR_ERR(priv->base);
 
 	priv->pdev = pdev;
 	platform_set_drvdata(pdev, priv);