HID: wacom: Release device resource data obtained by devres_alloc()

Free device resource data, if __wacom_devm_sysfs_create_group
is not successful.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/wacom_sys.c

@@ -1213,8 +1213,10 @@ static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
 	devres->root = root;
 
 	error = sysfs_create_group(devres->root, group);
-	if (error)
+	if (error) {
+		devres_free(devres);
 		return error;
+	}
 
 	devres_add(&wacom->hdev->dev, devres);