video: 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: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/video/omap2/vrfb.c b/drivers/video/omap2/vrfb.c
index 5d8fdac..10560ef 100644
--- a/drivers/video/omap2/vrfb.c
+++ b/drivers/video/omap2/vrfb.c
@@ -20,6 +20,7 @@
 
 /*#define DEBUG*/
 
+#include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/ioport.h>
@@ -357,11 +358,9 @@
 		return -EINVAL;
 	}
 
-	vrfb_base = devm_request_and_ioremap(&pdev->dev, mem);
-	if (!vrfb_base) {
-		dev_err(&pdev->dev, "can't ioremap vrfb memory\n");
-		return -ENOMEM;
-	}
+	vrfb_base = devm_ioremap_resource(&pdev->dev, mem);
+	if (IS_ERR(vrfb_base))
+		return PTR_ERR(vrfb_base);
 
 	num_ctxs = pdev->num_resources - 1;