video/fbdev/dnfb: Use common error handling code in dnfb_probe()

Add a jump target so that a bit of exception handling can be better reused
at the end of this function.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/dnfb.c

@@ -242,16 +242,13 @@ static int dnfb_probe(struct platform_device *dev)
 	info->screen_base = (u_char *) info->fix.smem_start;
 
 	err = fb_alloc_cmap(&info->cmap, 2, 0);
-	if (err < 0) {
-		framebuffer_release(info);
-		return err;
-	}
+	if (err < 0)
+		goto release_framebuffer;
 
 	err = register_framebuffer(info);
 	if (err < 0) {
 		fb_dealloc_cmap(&info->cmap);
-		framebuffer_release(info);
-		return err;
+		goto release_framebuffer;
 	}
 	platform_set_drvdata(dev, info);
 
@@ -265,6 +262,10 @@ static int dnfb_probe(struct platform_device *dev)
 
 	printk("apollo frame buffer alive and kicking !\n");
 	return err;
+
+release_framebuffer:
+	framebuffer_release(info);
+	return err;
 }
 
 static struct platform_driver dnfb_driver = {