[IA64] constify function pointer tables

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/hp/common/sba_iommu.c

@@ -1871,7 +1871,7 @@ ioc_show(struct seq_file *s, void *v)
 	return 0;
 }
 
-static struct seq_operations ioc_seq_ops = {
+static const struct seq_operations ioc_seq_ops = {
 	.start = ioc_start,
 	.next  = ioc_next,
 	.stop  = ioc_stop,