malidp: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Brian Starkey <brian.starkey@arm.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>

drivers/gpu/drm/arm/malidp_drv.c

@@ -549,19 +549,12 @@ static const struct file_operations malidp_debugfs_fops = {
 static int malidp_debugfs_init(struct drm_minor *minor)
 {
 	struct malidp_drm *malidp = minor->dev->dev_private;
-	struct dentry *dentry = NULL;
 
 	malidp_error_stats_init(&malidp->de_errors);
 	malidp_error_stats_init(&malidp->se_errors);
 	spin_lock_init(&malidp->errors_lock);
-	dentry = debugfs_create_file("debug",
-				     S_IRUGO | S_IWUSR,
-				     minor->debugfs_root, minor->dev,
-				     &malidp_debugfs_fops);
-	if (!dentry) {
-		DRM_ERROR("Cannot create debug file\n");
-		return -ENOMEM;
-	}
+	debugfs_create_file("debug", S_IRUGO | S_IWUSR, minor->debugfs_root,
+			    minor->dev, &malidp_debugfs_fops);
 	return 0;
 }