video: udlfb: Deletion of unnecessary checks before the function call "vfree"

The vfree() function performs also input parameter validation. Thus the test
around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/video/fbdev/udlfb.c b/drivers/video/fbdev/udlfb.c
index 046d51d..ff2b873 100644
--- a/drivers/video/fbdev/udlfb.c
+++ b/drivers/video/fbdev/udlfb.c
@@ -922,8 +922,7 @@
 {
 	struct dlfb_data *dev = container_of(kref, struct dlfb_data, kref);
 
-	if (dev->backing_buffer)
-		vfree(dev->backing_buffer);
+	vfree(dev->backing_buffer);
 
 	kfree(dev->edid);
 
@@ -953,8 +952,7 @@
 			fb_dealloc_cmap(&info->cmap);
 		if (info->monspecs.modedb)
 			fb_destroy_modedb(info->monspecs.modedb);
-		if (info->screen_base)
-			vfree(info->screen_base);
+		vfree(info->screen_base);
 
 		fb_destroy_modelist(&info->modelist);
 
@@ -1203,8 +1201,7 @@
 		if (!new_back)
 			pr_info("No shadow/backing buffer allocated\n");
 		else {
-			if (dev->backing_buffer)
-				vfree(dev->backing_buffer);
+			vfree(dev->backing_buffer);
 			dev->backing_buffer = new_back;
 		}
 	}