watchdog: 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: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c
index dcba5da..de1f3fa 100644
--- a/drivers/watchdog/pnx4008_wdt.c
+++ b/drivers/watchdog/pnx4008_wdt.c
@@ -155,9 +155,9 @@
 		heartbeat = DEFAULT_HEARTBEAT;
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	wdt_base = devm_request_and_ioremap(&pdev->dev, r);
-	if (!wdt_base)
-		return -EADDRINUSE;
+	wdt_base = devm_ioremap_resource(&pdev->dev, r);
+	if (IS_ERR(wdt_base))
+		return PTR_ERR(wdt_base);
 
 	wdt_clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(wdt_clk))