feat(tc): setup ni-tower non-secure access for TC3

NI-Tower's component's registers are need to be accessed from
kernel NI-PMU driver so enable NS access to it.

Change-Id: I83a8b3a1d2778baf767ff93263e246d127ef8114
Signed-off-by: Jagdish Gediya <jagdish.gediya@arm.com>
Signed-off-by: Leo Yan <leo.yan@arm.com>
diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index 3ea29eb..83a5cd2 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -362,6 +362,7 @@
 void plat_arm_interconnect_exit_coherency(void);
 void plat_arm_program_trusted_mailbox(uintptr_t address);
 bool plat_arm_bl1_fwu_needed(void);
+int plat_arm_ni_setup(uintptr_t global_cfg);
 __dead2 void plat_arm_error_handler(int err);
 __dead2 void plat_arm_system_reset(void);