Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/irqchip/irq-bcm2835.c b/drivers/irqchip/irq-bcm2835.c
index d2da8a1..418245d 100644
--- a/drivers/irqchip/irq-bcm2835.c
+++ b/drivers/irqchip/irq-bcm2835.c
@@ -1,17 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2010 Broadcom
  * Copyright 2012 Simon Arlott, Chris Boot, Stephen Warren
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  * Quirk 1: Shortcut interrupts don't set the bank 1/2 register pending bits
  *
  * If an interrupt fires on bank 1 that isn't in the shortcuts list, bit 8