[IA64] fix ia64 granttab xfer.

On ia64 steal_page() also update the p2m table so that
guest_physmap_remove_page() call isn't necessary.
#ifndef out the call.

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>

diff -r 74c35b543f27 xen/common/grant_table.c
--- a/xen/common/grant_table.c	Thu May 29 18:14:33 2008 +0900
+++ b/xen/common/grant_table.c	Thu May 29 19:23:07 2008 +0900
@@ -1112,7 +1112,9 @@
             goto copyback;
         }
 
+#ifndef __ia64__ /* on ia64 steal_page() also does remove_page() */
         guest_physmap_remove_page(d, gop.mfn, mfn, 0);
+#endif
 
         /* Find the target domain. */
         if ( unlikely((e = rcu_lock_domain_by_id(gop.domid)) == NULL) )