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/drivers/bpmp_ipc.h b/plat/nvidia/tegra/include/drivers/bpmp_ipc.h
index 0d1e405..a0d02c9 100644
--- a/plat/nvidia/tegra/include/drivers/bpmp_ipc.h
+++ b/plat/nvidia/tegra/include/drivers/bpmp_ipc.h
@@ -1,11 +1,12 @@
 /*
  * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2020, NVIDIA Corporation. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __BPMP_IPC_H__
-#define __BPMP_IPC_H__
+#ifndef BPMP_IPC_H
+#define BPMP_IPC_H
 
 #include <lib/utils_def.h>
 #include <stdbool.h>
@@ -44,4 +45,4 @@
  */
 int tegra_bpmp_ipc_disable_clock(uint32_t clk_id);
 
-#endif /* __BPMP_IPC_H__ */
+#endif /* BPMP_IPC_H */