x86: Add pcibios_fixup_irqs to x86_init

Platforms like Moorestown want to override the pcibios_fixup_irqs
default function. Add it to x86_init.pci.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <43F901BD926A4E43B106BF17856F07559FB80D00@orsmsx508.amr.corp.intel.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h
index 46511c5..6e69edf 100644
--- a/arch/x86/include/asm/pci_x86.h
+++ b/arch/x86/include/asm/pci_x86.h
@@ -113,6 +113,7 @@
 extern void __init pcibios_irq_init(void);
 extern int __init pcibios_init(void);
 extern int pci_legacy_init(void);
+extern void pcibios_fixup_irqs(void);
 
 /* pci-mmconfig.c */
 
@@ -188,7 +189,9 @@
 #  define x86_default_pci_init		pci_legacy_init
 # endif
 # define x86_default_pci_init_irq	pcibios_irq_init
+# define x86_default_pci_fixup_irqs	pcibios_fixup_irqs
 #else
 # define x86_default_pci_init		NULL
 # define x86_default_pci_init_irq	NULL
+# define x86_default_pci_fixup_irqs	NULL
 #endif