Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/ia64/include/asm/pci.h b/arch/ia64/include/asm/pci.h
index 780e874..8c163d1 100644
--- a/arch/ia64/include/asm/pci.h
+++ b/arch/ia64/include/asm/pci.h
@@ -39,9 +39,9 @@
 				      struct vm_area_struct *vma,
 				      enum pci_mmap_state mmap_state);
 
-#define pci_get_legacy_mem platform_pci_get_legacy_mem
-#define pci_legacy_read platform_pci_legacy_read
-#define pci_legacy_write platform_pci_legacy_write
+char *pci_get_legacy_mem(struct pci_bus *bus);
+int pci_legacy_read(struct pci_bus *bus, u16 port, u32 *val, u8 size);
+int pci_legacy_write(struct pci_bus *bus, u16 port, u32 val, u8 size);
 
 struct pci_controller {
 	struct acpi_device *companion;
@@ -69,7 +69,4 @@
 	return channel ? isa_irq_to_vector(15) : isa_irq_to_vector(14);
 }
 
-#ifdef CONFIG_INTEL_IOMMU
-extern void pci_iommu_alloc(void);
-#endif
 #endif /* _ASM_IA64_PCI_H */