Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/char/ds1620.c b/drivers/char/ds1620.c
index a5ecf6d..cf89a96 100644
--- a/drivers/char/ds1620.c
+++ b/drivers/char/ds1620.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/drivers/char/ds1620.c: Dallas Semiconductors DS1620
  *   thermometer driver (as used in the Rebel.com NetWinder)
@@ -212,7 +213,7 @@
 
 static int ds1620_open(struct inode *inode, struct file *file)
 {
-	return nonseekable_open(inode, file);
+	return stream_open(inode, file);
 }
 
 static ssize_t