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/drivers/renesas/rcar/io/io_common.h b/drivers/renesas/rcar/io/io_common.h
index c5729b8..6eb7777 100644
--- a/drivers/renesas/rcar/io/io_common.h
+++ b/drivers/renesas/rcar/io/io_common.h
@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef IO_COMMON_H__
-#define IO_COMMON_H__
+#ifndef IO_COMMON_H
+#define IO_COMMON_H
 
 typedef struct io_drv_spec {
 	size_t offset;
@@ -13,4 +13,4 @@
 	uint32_t partition;
 } io_drv_spec_t;
 
-#endif
+#endif /* IO_COMMON_H */
diff --git a/drivers/renesas/rcar/io/io_emmcdrv.h b/drivers/renesas/rcar/io/io_emmcdrv.h
index 82c6c51..95070f2 100644
--- a/drivers/renesas/rcar/io/io_emmcdrv.h
+++ b/drivers/renesas/rcar/io/io_emmcdrv.h
@@ -4,10 +4,10 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef IO_EMMCDRV_H__
-#define IO_EMMCDRV_H__
+#ifndef IO_EMMCDRV_H
+#define IO_EMMCDRV_H
 
 struct io_dev_connector;
 int32_t rcar_register_io_dev_emmcdrv(const io_dev_connector_t **connector);
 
-#endif
+#endif /* IO_EMMCDRV_H */
diff --git a/drivers/renesas/rcar/io/io_memdrv.h b/drivers/renesas/rcar/io/io_memdrv.h
index 41727d3..90e6812 100644
--- a/drivers/renesas/rcar/io/io_memdrv.h
+++ b/drivers/renesas/rcar/io/io_memdrv.h
@@ -4,10 +4,10 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef IO_MEMDRV_H__
-#define IO_MEMDRV_H__
+#ifndef IO_MEMDRV_H
+#define IO_MEMDRV_H
 
 struct io_dev_connector;
 int32_t rcar_register_io_dev_memdrv(const io_dev_connector_t **connector);
 
-#endif
+#endif /* IO_MEMDRV_H */
diff --git a/drivers/renesas/rcar/io/io_private.h b/drivers/renesas/rcar/io/io_private.h
index d0e66c0..207523a 100644
--- a/drivers/renesas/rcar/io/io_private.h
+++ b/drivers/renesas/rcar/io/io_private.h
@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef IO_PRIVATE_H_
-#define IO_PRIVATE_H_
+#ifndef IO_PRIVATE_H
+#define IO_PRIVATE_H
 
 /*
  * Return codes reported by 'io_*' APIs
@@ -17,4 +17,4 @@
 #define IO_NOT_SUPPORTED	(-0x82)
 #define IO_RESOURCES_EXHAUSTED	(-0x83)
 
-#endif
+#endif /* IO_PRIVATE_H */
diff --git a/drivers/renesas/rcar/io/io_rcar.h b/drivers/renesas/rcar/io/io_rcar.h
index 2420902..c26a617 100644
--- a/drivers/renesas/rcar/io/io_rcar.h
+++ b/drivers/renesas/rcar/io/io_rcar.h
@@ -4,11 +4,11 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef IO_RCAR_H__
-#define IO_RCAR_H__
+#ifndef IO_RCAR_H
+#define IO_RCAR_H
 
 int32_t rcar_register_io_dev(const io_dev_connector_t **dev_con);
 int32_t rcar_get_certificate(const int32_t name, uint32_t *cert);
 void rcar_read_certificate(uint64_t cert, uint32_t *size, uintptr_t *dest);
 
-#endif
+#endif /* IO_RCAR_H */