mtd: 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>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/mtd/nand/lpc32xx_slc.c b/drivers/mtd/nand/lpc32xx_slc.c
index 030b78c..be94ed5 100644
--- a/drivers/mtd/nand/lpc32xx_slc.c
+++ b/drivers/mtd/nand/lpc32xx_slc.c
@@ -778,11 +778,9 @@
 	}
 	host->io_base_dma = rc->start;
 
-	host->io_base = devm_request_and_ioremap(&pdev->dev, rc);
-	if (host->io_base == NULL) {
-		dev_err(&pdev->dev, "ioremap failed\n");
-		return -ENOMEM;
-	}
+	host->io_base = devm_ioremap_resource(&pdev->dev, rc);
+	if (IS_ERR(host->io_base))
+		return PTR_ERR(host->io_base);
 
 	if (pdev->dev.of_node)
 		host->ncfg = lpc32xx_parse_dt(&pdev->dev);