Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/irqchip/arm-gic-common.h b/include/linux/irqchip/arm-gic-common.h
index 0a83b43..b9850f5 100644
--- a/include/linux/irqchip/arm-gic-common.h
+++ b/include/linux/irqchip/arm-gic-common.h
@@ -1,11 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * include/linux/irqchip/arm-gic-common.h
  *
  * Copyright (C) 2016 ARM Limited, All Rights Reserved.
- *
- * 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.
  */
 #ifndef __LINUX_IRQCHIP_ARM_GIC_COMMON_H
 #define __LINUX_IRQCHIP_ARM_GIC_COMMON_H
@@ -13,6 +10,12 @@
 #include <linux/types.h>
 #include <linux/ioport.h>
 
+#define GICD_INT_DEF_PRI		0xa0
+#define GICD_INT_DEF_PRI_X4		((GICD_INT_DEF_PRI << 24) |\
+					(GICD_INT_DEF_PRI << 16) |\
+					(GICD_INT_DEF_PRI << 8) |\
+					GICD_INT_DEF_PRI)
+
 enum gic_type {
 	GIC_V2,
 	GIC_V3,
@@ -33,4 +36,9 @@
 
 const struct gic_kvm_info *gic_get_kvm_info(void);
 
+struct irq_domain;
+struct fwnode_handle;
+int gicv2m_init(struct fwnode_handle *parent_handle,
+		struct irq_domain *parent);
+
 #endif /* __LINUX_IRQCHIP_ARM_GIC_COMMON_H */