video: ocfb: Use devm_platform_ioremap_resource() in ocfb_probe()

Simplify this function implementation by using a known wrapper function.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/61b75aa6-ff92-e0ed-53f2-50a95d93d1f6@web.de

drivers/video/fbdev/ocfb.c

@@ -297,7 +297,6 @@ static int ocfb_probe(struct platform_device *pdev)
 {
 	int ret = 0;
 	struct ocfb_dev *fbdev;
-	struct resource *res;
 	int fbsize;
 
 	fbdev = devm_kzalloc(&pdev->dev, sizeof(*fbdev), GFP_KERNEL);
@@ -319,13 +318,7 @@ static int ocfb_probe(struct platform_device *pdev)
 	ocfb_init_var(fbdev);
 	ocfb_init_fix(fbdev);
 
-	/* Request I/O resource */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "I/O resource request failed\n");
-		return -ENXIO;
-	}
-	fbdev->regs = devm_ioremap_resource(&pdev->dev, res);
+	fbdev->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(fbdev->regs))
 		return PTR_ERR(fbdev->regs);