Standardise header guards across codebase

All identifiers, regardless of use, that start with two underscores are
reserved. This means they can't be used in header guards.

The style that this project is now to use the full name of the file in
capital letters followed by 'H'. For example, for a file called
"uart_example.h", the header guard is UART_EXAMPLE_H.

The exceptions are files that are imported from other projects:

- CryptoCell driver
- dt-bindings folders
- zlib headers

Change-Id: I50561bf6c88b491ec440d0c8385c74650f3c106e
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/ti/k3/include/k3_console.h b/plat/ti/k3/include/k3_console.h
index 5b01a31..6376ab3 100644
--- a/plat/ti/k3/include/k3_console.h
+++ b/plat/ti/k3/include/k3_console.h
@@ -4,9 +4,9 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __K3_CONSOLE_H__
-#define __K3_CONSOLE_H__
+#ifndef K3_CONSOLE_H
+#define K3_CONSOLE_H
 
 void bl31_console_setup(void);
 
-#endif /* __K3_CONSOLE_H__ */
+#endif /* K3_CONSOLE_H */
diff --git a/plat/ti/k3/include/k3_gicv3.h b/plat/ti/k3/include/k3_gicv3.h
index bbf5bf9..52f34ff 100644
--- a/plat/ti/k3/include/k3_gicv3.h
+++ b/plat/ti/k3/include/k3_gicv3.h
@@ -4,8 +4,10 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __K3_GICV3_H__
-#define __K3_GICV3_H__
+#ifndef K3_GICV3_H
+#define K3_GICV3_H
+
+#include <stdint.h>
 
 void k3_gic_driver_init(uintptr_t gicd_base, uintptr_t gicr_base);
 void k3_gic_init(void);
@@ -13,4 +15,4 @@
 void k3_gic_cpuif_disable(void);
 void k3_gic_pcpu_init(void);
 
-#endif /* __K3_GICV3_H__ */
+#endif /* K3_GICV3_H */
diff --git a/plat/ti/k3/include/plat_macros.S b/plat/ti/k3/include/plat_macros.S
index 96d1cd2..38056b5 100644
--- a/plat/ti/k3/include/plat_macros.S
+++ b/plat/ti/k3/include/plat_macros.S
@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __PLAT_MACROS_S__
-#define __PLAT_MACROS_S__
+#ifndef PLAT_MACROS_S
+#define PLAT_MACROS_S
 
 	/* ---------------------------------------------
 	 * The below required platform porting macro
@@ -18,4 +18,4 @@
 	/* STUB */
 	.endm
 
-#endif /* __PLAT_MACROS_S__ */
+#endif /* PLAT_MACROS_S */
diff --git a/plat/ti/k3/include/platform_def.h b/plat/ti/k3/include/platform_def.h
index ab0739e..7d1df0a 100644
--- a/plat/ti/k3/include/platform_def.h
+++ b/plat/ti/k3/include/platform_def.h
@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __PLATFORM_DEF_H__
-#define __PLATFORM_DEF_H__
+#ifndef PLATFORM_DEF_H
+#define PLATFORM_DEF_H
 
 #include <arch.h>
 #include <board_def.h>
@@ -206,4 +206,4 @@
 #define TI_SCI_HOST_ID			10
 #define TI_SCI_MAX_MESSAGE_SIZE		52
 
-#endif /* __PLATFORM_DEF_H__ */
+#endif /* PLATFORM_DEF_H */