Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/mfd/axp20x-i2c.c b/drivers/mfd/axp20x-i2c.c
index a7b7c54..14f9df7 100644
--- a/drivers/mfd/axp20x-i2c.c
+++ b/drivers/mfd/axp20x-i2c.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * I2C driver for the X-Powers' Power Management ICs
  *
@@ -10,10 +11,6 @@
  * Copyright (C) 2014 Carlo Caione
  *
  * Author: Carlo Caione <carlo@caione.org>
- *
- * 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/acpi.h>
@@ -65,6 +62,7 @@
 	{ .compatible = "x-powers,axp202", .data = (void *)AXP202_ID },
 	{ .compatible = "x-powers,axp209", .data = (void *)AXP209_ID },
 	{ .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
+	{ .compatible = "x-powers,axp223", .data = (void *)AXP223_ID },
 	{ .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
 	{ },
 };
@@ -75,6 +73,7 @@
 	{ "axp202", 0 },
 	{ "axp209", 0 },
 	{ "axp221", 0 },
+	{ "axp223", 0 },
 	{ "axp806", 0 },
 	{ },
 };