Fix the array size of mpidr_aff_map_nodes_t.

This patch fixes the array size of mpidr_aff_map_nodes_t which
was less by one element.

Fixes ARM-software/tf-issues#264

Change-Id: I48264f6f9e7046a3d0f4cbcd63b9ba49657e8818
diff --git a/services/std_svc/psci/psci_private.h b/services/std_svc/psci/psci_private.h
index 924a24f..24a5604 100644
--- a/services/std_svc/psci/psci_private.h
+++ b/services/std_svc/psci/psci_private.h
@@ -60,7 +60,7 @@
 	int max;
 } aff_limits_node_t;
 
-typedef aff_map_node_t (*mpidr_aff_map_nodes_t[MPIDR_MAX_AFFLVL]);
+typedef aff_map_node_t (*mpidr_aff_map_nodes_t[MPIDR_MAX_AFFLVL + 1]);
 typedef unsigned int (*afflvl_power_on_finisher_t)(aff_map_node_t *);
 
 /*******************************************************************************