i2c: Convert to devm_ioremap_resource()

Convert all uses of devm_request_and_ioremap() to the newly introduced
devm_ioremap_resource() 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: Thierry Reding <thierry.reding@avionic-design.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index a290d08..c807a6d 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -1042,11 +1042,10 @@
 		goto err_clk;
 	}
 
-	i2c->regs = devm_request_and_ioremap(&pdev->dev, res);
+	i2c->regs = devm_ioremap_resource(&pdev->dev, res);
 
-	if (i2c->regs == NULL) {
-		dev_err(&pdev->dev, "cannot map IO\n");
-		ret = -ENXIO;
+	if (IS_ERR(i2c->regs)) {
+		ret = PTR_ERR(i2c->regs);
 		goto err_clk;
 	}