[PATCH] io_apic.h needs apicdef.h

A -mm patch caused:

In file included from drivers/pci/quirks.c:532:
include/asm/io_apic.h:61: error: "MAX_IO_APICS" undeclared here (not in a function)

So let's include the needed header.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/asm-x86_64/io_apic.h b/include/asm-x86_64/io_apic.h
index f4fb238..969d225 100644
--- a/include/asm-x86_64/io_apic.h
+++ b/include/asm-x86_64/io_apic.h
@@ -3,6 +3,7 @@
 
 #include <asm/types.h>
 #include <asm/mpspec.h>
+#include <asm/apicdef.h>
 
 /*
  * Intel IO-APIC support for SMP and UP systems.