Tegra194: drivers: fix violations of MISRA Rule 21.1

This patch fixes the violations of Rule 21.1 from all the
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: I12e17a5d7158defd33b03416daab3049749905fc

plat/nvidia/tegra/soc/t194/drivers/include/mce_private.h

 /*
- * Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __MCE_PRIVATE_H__
-#define __MCE_PRIVATE_H__
+#ifndef MCE_PRIVATE_H
+#define MCE_PRIVATE_H
 
 #include <tegra_def.h>
 
@@ -71,4 +71,4 @@ void nvg_enable_strict_checking_mode(void);
 /* MCE helper functions */
 void mce_enable_strict_checking(void);
 
-#endif /* __MCE_PRIVATE_H__ */
+#endif /* MCE_PRIVATE_H */

plat/nvidia/tegra/soc/t194/drivers/include/se.h

 /*
- * Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __SE_H__
-#define __SE_H__
+#ifndef SE_H
+#define SE_H
 
 int32_t tegra_se_suspend(void);
 void tegra_se_resume(void);
 
-#endif /* __SE_H__ */
+#endif /* SE_H */

plat/nvidia/tegra/soc/t194/drivers/se/se_private.h

 /*
  * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
- * Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __SE_PRIVATE_H__
-#define __SE_PRIVATE_H__
+#ifndef SE_PRIVATE_H
+#define SE_PRIVATE_H
 
 #include <lib/utils_def.h>
 
@@ -82,4 +82,4 @@ static inline void tegra_se_write_32(uint32_t offset, uint32_t val)
 	mmio_write_32(TEGRA_SE0_BASE + offset, val);
 }
 
-#endif /* __SE_PRIVATE_H__ */
+#endif /* SE_PRIVATE_H */