Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/uio_driver.h b/include/linux/uio_driver.h
index 6f8b68c..01081c4 100644
--- a/include/linux/uio_driver.h
+++ b/include/linux/uio_driver.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * include/linux/uio_driver.h
  *
@@ -7,8 +8,6 @@
  * Copyright(C) 2006, Greg Kroah-Hartman <greg@kroah.com>
  *
  * Userspace IO driver.
- *
- * Licensed under the GPLv2 only.
  */
 
 #ifndef _UIO_DRIVER_H_
@@ -133,6 +132,7 @@
 #define UIO_MEM_PHYS	1
 #define UIO_MEM_LOGICAL	2
 #define UIO_MEM_VIRTUAL 3
+#define UIO_MEM_IOVA	4
 
 /* defines for uio_port->porttype */
 #define UIO_PORT_NONE	0