[IA64] Kexec: Allow EFI_RID to be used in ivt.S

This is a preliminary patch to allow itentity mapping
of EFI memory to be handled in the asm page fault handlers.

Cc: Isaku Yamahata <yamahata@valinux.co.jp>
Cc: Tristan Gingold <tgingold@free.fr>
Cc: Alex Williamson <alex.williamson@hp.com>
Cc: Aron Griffis <aron@hp.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

Index: xen-unstable.hg/xen/arch/ia64/xen/ivt.S
===================================================================
--- xen-unstable.hg.orig/xen/arch/ia64/xen/ivt.S	2008-02-05 16:18:41.000000000 +0900
+++ xen-unstable.hg/xen/arch/ia64/xen/ivt.S	2008-02-05 16:18:54.000000000 +0900
@@ -57,6 +57,7 @@
 #include <asm/thread_info.h>
 #include <asm/unistd.h>
 #include <xen/errno.h>
+#include <linux/efi.h>
 
 #if 1
 # define PSR_DEFAULT_BITS	psr.ac