Tegra: memctrl_v2: remove support to secure TZSRAM

This patch removes support to secure the on-chip TZSRAM memory for
Tegra186 and Tegra194 platforms as the previous bootloader does that
for them.

Change-Id: I50c7b7f9694285fe31135ada09baed1cfedaaf07
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/include/drivers/mce.h b/plat/nvidia/tegra/include/drivers/mce.h
index 4470b6b..5f1bb4f 100644
--- a/plat/nvidia/tegra/include/drivers/mce.h
+++ b/plat/nvidia/tegra/include/drivers/mce.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -69,7 +69,6 @@
 int mce_update_reset_vector(void);
 int mce_update_gsc_videomem(void);
 int mce_update_gsc_tzdram(void);
-int mce_update_gsc_tzram(void);
 __dead2 void mce_enter_ccplex_state(uint32_t state_idx);
 void mce_update_cstate_info(const mce_cstate_info_t *cstate);
 void mce_verify_firmware_version(void);