build(intel): enable access to on-chip ram in BL31 for N5X

This adds the ncore ccu access and enable access to the
on-chip ram for N5X device in BL31.

Signed-off-by: Boon Khai Ng <boon.khai.ng@intel.com>
Signed-off-by: Sieu Mun Tang <sieu.mun.tang@intel.com>
Change-Id: I713f6e93d33b6e91705547477ca32cfba5c8c13d
diff --git a/plat/intel/soc/n5x/bl31_plat_setup.c b/plat/intel/soc/n5x/bl31_plat_setup.c
index aeed3ac..2a8daa6 100644
--- a/plat/intel/soc/n5x/bl31_plat_setup.c
+++ b/plat/intel/soc/n5x/bl31_plat_setup.c
@@ -13,6 +13,7 @@
 #include <lib/mmio.h>
 #include <lib/xlat_tables/xlat_tables.h>
 
+#include "ccu/ncore_ccu.h"
 #include "socfpga_mailbox.h"
 #include "socfpga_private.h"
 
@@ -115,6 +116,8 @@
 		(uint64_t)plat_secondary_cpus_bl31_entry);
 
 	mailbox_hps_stage_notify(HPS_EXECUTION_STATE_SSBL);
+
+	ncore_enable_ocram_firewall();
 }
 
 const mmap_region_t plat_dm_mmap[] = {