Tegra: include: fix violations of MISRA Rule 21.1

This patch fixes the violations of Rule 21.1 from all the
Tegra common header files.

Rule 21.1 "#define and #undef shall not be used on a reserved
           identifier or reserved macro name"

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Change-Id: I2e117645c110e04c13fa86ebbbb38df4951d2185
diff --git a/plat/nvidia/tegra/include/t194/tegra194_private.h b/plat/nvidia/tegra/include/t194/tegra194_private.h
index e519cdc..8f1deb2 100644
--- a/plat/nvidia/tegra/include/t194/tegra194_private.h
+++ b/plat/nvidia/tegra/include/t194/tegra194_private.h
@@ -1,11 +1,11 @@
 /*
- * Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __TEGRA194_PRIVATE_H__
-#define __TEGRA194_PRIVATE_H__
+#ifndef TEGRA194_PRIVATE_H
+#define TEGRA194_PRIVATE_H
 
 void tegra194_cpu_reset_handler(void);
 uint64_t tegra194_get_cpu_reset_handler_base(void);
@@ -13,4 +13,4 @@
 uint64_t tegra194_get_smmu_ctx_offset(void);
 void tegra194_set_system_suspend_entry(void);
 
-#endif /* __TEGRA194_PRIVATE_H__ */
+#endif /* TEGRA194_PRIVATE_H */