Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/iommu/iommu-sysfs.c b/drivers/iommu/iommu-sysfs.c
index 36d1a7c..e436ff8 100644
--- a/drivers/iommu/iommu-sysfs.c
+++ b/drivers/iommu/iommu-sysfs.c
@@ -1,17 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * IOMMU sysfs class support
  *
  * Copyright (C) 2014 Red Hat, Inc.  All rights reserved.
  *     Author: Alex Williamson <alex.williamson@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/device.h>
 #include <linux/iommu.h>
-#include <linux/module.h>
+#include <linux/init.h>
 #include <linux/slab.h>
 
 /*
@@ -22,25 +19,25 @@
 	NULL,
 };
 
-static const struct attribute_group iommu_devices_attr_group = {
+static const struct attribute_group devices_attr_group = {
 	.name = "devices",
 	.attrs = devices_attr,
 };
 
-static const struct attribute_group *iommu_dev_groups[] = {
-	&iommu_devices_attr_group,
+static const struct attribute_group *dev_groups[] = {
+	&devices_attr_group,
 	NULL,
 };
 
-static void iommu_release_device(struct device *dev)
+static void release_device(struct device *dev)
 {
 	kfree(dev);
 }
 
 static struct class iommu_class = {
 	.name = "iommu",
-	.dev_release = iommu_release_device,
-	.dev_groups = iommu_dev_groups,
+	.dev_release = release_device,
+	.dev_groups = dev_groups,
 };
 
 static int __init iommu_dev_init(void)