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/mt8173/include/mcucfg.h b/plat/mediatek/mt8173/include/mcucfg.h
index 355c276..49d7c3e 100644
--- a/plat/mediatek/mt8173/include/mcucfg.h
+++ b/plat/mediatek/mt8173/include/mcucfg.h
@@ -3,8 +3,8 @@
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
-#ifndef __MCUCFG_H__
-#define __MCUCFG_H__
+#ifndef MCUCFG_H
+#define MCUCFG_H
 
 #include <mt8173_def.h>
 #include <stdint.h>
@@ -216,4 +216,4 @@
 			  ACLK_EMI_DYNAMIC_CG_EN | ACLK_INFRA_DYNAMIC_CG_EN,
 };
 
-#endif  /* __MCUCFG_H__ */
+#endif /* MCUCFG_H */
diff --git a/plat/mediatek/mt8173/include/mt8173_def.h b/plat/mediatek/mt8173/include/mt8173_def.h
index 3289de4..58962f0 100644
--- a/plat/mediatek/mt8173/include/mt8173_def.h
+++ b/plat/mediatek/mt8173/include/mt8173_def.h
@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __MT8173_DEF_H__
-#define __MT8173_DEF_H__
+#ifndef MT8173_DEF_H
+#define MT8173_DEF_H
 
 #if RESET_TO_BL31
 #error "MT8173 is incompatible with RESET_TO_BL31!"
@@ -149,4 +149,4 @@
 		mtk_make_pwrstate_lvl1(lvl1_state, lvl0_state, pwr_lvl, type))
 
 
-#endif /* __MT8173_DEF_H__ */
+#endif /* MT8173_DEF_H */
diff --git a/plat/mediatek/mt8173/include/plat_private.h b/plat/mediatek/mt8173/include/plat_private.h
index 87ffbfc..cd92d34 100644
--- a/plat/mediatek/mt8173/include/plat_private.h
+++ b/plat/mediatek/mt8173/include/plat_private.h
@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __PLAT_PRIVATE_H__
-#define __PLAT_PRIVATE_H__
+#ifndef PLAT_PRIVATE_H
+#define PLAT_PRIVATE_H
 
 /*******************************************************************************
  * Function and variable prototypes
@@ -24,4 +24,4 @@
 /* Declarations for plat_topology.c */
 int mt_setup_topology(void);
 
-#endif /* __PLAT_PRIVATE_H__ */
+#endif /* PLAT_PRIVATE_H */
diff --git a/plat/mediatek/mt8173/include/plat_sip_calls.h b/plat/mediatek/mt8173/include/plat_sip_calls.h
index 2593709..88202cc 100644
--- a/plat/mediatek/mt8173/include/plat_sip_calls.h
+++ b/plat/mediatek/mt8173/include/plat_sip_calls.h
@@ -4,8 +4,8 @@
  * 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
@@ -19,4 +19,4 @@
 #define MTK_SIP_CLR_HDCP_KEY			0x82000406
 #define MTK_SIP_SET_HDCP_KEY_EX			0x82000407
 
-#endif /* __PLAT_SIP_CALLS_H__ */
+#endif /* PLAT_SIP_CALLS_H */
diff --git a/plat/mediatek/mt8173/include/power_tracer.h b/plat/mediatek/mt8173/include/power_tracer.h
index e8c0552..195366d 100644
--- a/plat/mediatek/mt8173/include/power_tracer.h
+++ b/plat/mediatek/mt8173/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/mt8173/include/scu.h b/plat/mediatek/mt8173/include/scu.h
index 2ce4b23..b1e9424 100644
--- a/plat/mediatek/mt8173/include/scu.h
+++ b/plat/mediatek/mt8173/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 */