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/mediatek/mt6795/include/mcucfg.h b/plat/mediatek/mt6795/include/mcucfg.h
index eff8d34..7f6a786 100644
--- a/plat/mediatek/mt6795/include/mcucfg.h
+++ b/plat/mediatek/mt6795/include/mcucfg.h
@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __MCUCFG_H__
-#define __MCUCFG_H__
+#ifndef MCUCFG_H
+#define MCUCFG_H
 
 #include <platform_def.h>
 #include <stdint.h>
@@ -151,4 +151,4 @@
 	MP1_L2RSTDISABLE = 1 << MP1_L2RSTDISABLE_SHIFT
 };
 
-#endif  /* __MCUCFG_H__ */
+#endif  /* MCUCFG_H */
diff --git a/plat/mediatek/mt6795/include/plat_private.h b/plat/mediatek/mt6795/include/plat_private.h
index 9c6c1f0..10baa23 100644
--- a/plat/mediatek/mt6795/include/plat_private.h
+++ b/plat/mediatek/mt6795/include/plat_private.h
@@ -4,8 +4,9 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __PLAT_PRIVATE_H__
-#define __PLAT_PRIVATE_H__
+#ifndef PLAT_PRIVATE_H
+#define PLAT_PRIVATE_H
+
 #include <stdint.h>
 #include <xlat_tables.h>
 
@@ -33,4 +34,4 @@
 void plat_mt_gic_cpuif_disable(void);
 void plat_mt_gic_pcpu_init(void);
 
-#endif /* __PLAT_PRIVATE_H__ */
+#endif /* PLAT_PRIVATE_H */
diff --git a/plat/mediatek/mt6795/include/plat_sip_calls.h b/plat/mediatek/mt6795/include/plat_sip_calls.h
index b328195..b9a1363 100644
--- a/plat/mediatek/mt6795/include/plat_sip_calls.h
+++ b/plat/mediatek/mt6795/include/plat_sip_calls.h
@@ -4,12 +4,12 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __PLAT_SIP_CALLS_H__
-#define __PLAT_SIP_CALLS_H__
+#ifndef PLAT_SIP_CALLS_H
+#define PLAT_SIP_CALLS_H
 
 /*******************************************************************************
  * Plat SiP function constants
  ******************************************************************************/
 #define MTK_PLAT_SIP_NUM_CALLS	0
 
-#endif /* __PLAT_SIP_CALLS_H__ */
+#endif /* PLAT_SIP_CALLS_H */
diff --git a/plat/mediatek/mt6795/include/power_tracer.h b/plat/mediatek/mt6795/include/power_tracer.h
index 5eb77e4..8c98dbd 100644
--- a/plat/mediatek/mt6795/include/power_tracer.h
+++ b/plat/mediatek/mt6795/include/power_tracer.h
@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __POWER_TRACER_H__
-#define __POWER_TRACER_H__
+#ifndef POWER_TRACER_H
+#define POWER_TRACER_H
 
 #define CPU_UP		0
 #define CPU_DOWN	1
@@ -16,4 +16,4 @@
 
 void trace_power_flow(unsigned long mpidr, unsigned char mode);
 
-#endif
+#endif /* POWER_TRACER_H */
diff --git a/plat/mediatek/mt6795/include/scu.h b/plat/mediatek/mt6795/include/scu.h
index 3c78692..625418a 100644
--- a/plat/mediatek/mt6795/include/scu.h
+++ b/plat/mediatek/mt6795/include/scu.h
@@ -4,10 +4,10 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __SCU_H__
-#define __SCU_H__
+#ifndef SCU_H
+#define SCU_H
 
 void disable_scu(unsigned long mpidr);
 void enable_scu(unsigned long mpidr);
 
-#endif
+#endif /* SCU_H */
diff --git a/plat/mediatek/mt6795/include/spm.h b/plat/mediatek/mt6795/include/spm.h
index 5e31276..5227e1d 100644
--- a/plat/mediatek/mt6795/include/spm.h
+++ b/plat/mediatek/mt6795/include/spm.h
@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __SPM_H__
-#define __SPM_H__
+#ifndef SPM_H
+#define SPM_H
 
 #define SPM_POWERON_CONFIG_SET			(SPM_BASE + 0x000)
 #define SPM_POWER_ON_VAL0			(SPM_BASE + 0x010)
@@ -195,4 +195,4 @@
 #define WAKE_SRC_ALL_MD32	(1 << 28)
 #define WAKE_SRC_CPU_IRQ	(1 << 29)
 
-#endif /* __SPM_H__ */
+#endif /* SPM_H */