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/tegra_gic.h b/plat/nvidia/tegra/include/drivers/tegra_gic.h
index 6106b40..6661dff 100644
--- a/plat/nvidia/tegra/include/drivers/tegra_gic.h
+++ b/plat/nvidia/tegra/include/drivers/tegra_gic.h
@@ -1,11 +1,12 @@
 /*
  * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2020, NVIDIA Corporation. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __TEGRA_GIC_H__
-#define __TEGRA_GIC_H__
+#ifndef TEGRA_GIC_H
+#define TEGRA_GIC_H
 
 #include <common/interrupt_props.h>
 
@@ -26,4 +27,4 @@
 void tegra_gic_setup(const interrupt_prop_t *interrupt_props,
 		     unsigned int interrupt_props_num);
 
-#endif /* __TEGRA_GIC_H__ */
+#endif /* TEGRA_GIC_H */