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/marvell/comphy/comphy-cp110.h b/drivers/marvell/comphy/comphy-cp110.h
index 1d7aec8..6eb7fd0 100644
--- a/drivers/marvell/comphy/comphy-cp110.h
+++ b/drivers/marvell/comphy/comphy-cp110.h
@@ -7,8 +7,8 @@
 
 /* Marvell CP110 SoC COMPHY unit driver */
 
-#ifndef _PHY_COMPHY_CP110_H
-#define _PHY_COMPHY_CP110_H
+#ifndef COMPHY_CP110_H
+#define COMPHY_CP110_H
 
 #define SD_ADDR(base, lane)			(base + 0x1000 * lane)
 #define HPIPE_ADDR(base, lane)			(SD_ADDR(base, lane) + 0x800)
@@ -862,5 +862,4 @@
 /* General defines */
 #define PLL_LOCK_TIMEOUT			15000
 
-#endif /* _PHY_COMPHY_CP110_H */
-
+#endif /* COMPHY_CP110_H */
diff --git a/drivers/marvell/comphy/phy-comphy-3700.h b/drivers/marvell/comphy/phy-comphy-3700.h
index 714a41c..1628e36 100644
--- a/drivers/marvell/comphy/phy-comphy-3700.h
+++ b/drivers/marvell/comphy/phy-comphy-3700.h
@@ -5,8 +5,8 @@
  * https://spdx.org/licenses
  */
 
-#ifndef _PHY_COMPHY_3700_H
-#define _PHY_COMPHY_3700_H
+#ifndef PHY_COMPHY_3700_H
+#define PHY_COMPHY_3700_H
 
 #define PLL_SET_DELAY_US			600
 #define COMPHY_PLL_TIMEOUT			1000
@@ -255,4 +255,4 @@
 int mvebu_3700_comphy_is_pll_locked(uint8_t comphy_index, uint32_t comphy_mode);
 int mvebu_3700_comphy_power_off(uint8_t comphy_index, uint32_t comphy_mode);
 int mvebu_3700_comphy_power_on(uint8_t comphy_index, uint32_t comphy_mode);
-#endif /* _PHY_COMPHY_3700_H */
+#endif /* PHY_COMPHY_3700_H */
diff --git a/drivers/marvell/comphy/phy-comphy-common.h b/drivers/marvell/comphy/phy-comphy-common.h
index ba1a83c..78c7a38 100644
--- a/drivers/marvell/comphy/phy-comphy-common.h
+++ b/drivers/marvell/comphy/phy-comphy-common.h
@@ -7,8 +7,8 @@
 
 /* Marvell CP110 ana A3700 common */
 
-#ifndef _PHY_COMPHY_COMMON_H
-#define _PHY_COMPHY_COMMON_H
+#ifndef PHY_COMPHY_COMMON_H
+#define PHY_COMPHY_COMMON_H
 
 /* #define DEBUG_COMPHY */
 #ifdef DEBUG_COMPHY
@@ -153,4 +153,4 @@
 	debug("new val 0x%x\n", mmio_read_16(addr));
 }
 
-#endif /* _PHY_COMPHY_COMMON_H */
+#endif /* PHY_COMPHY_COMMON_H */
diff --git a/drivers/marvell/comphy/phy-default-porting-layer.h b/drivers/marvell/comphy/phy-default-porting-layer.h
index 39cd181..b3ad7eb 100644
--- a/drivers/marvell/comphy/phy-default-porting-layer.h
+++ b/drivers/marvell/comphy/phy-default-porting-layer.h
@@ -5,8 +5,8 @@
  * https://spdx.org/licenses
  */
 
-#ifndef __PHY_DEFAULT_PORTING_LAYER_H
-#define __PHY_DEFAULT_PORTING_LAYER_H
+#ifndef PHY_DEFAULT_PORTING_LAYER_H
+#define PHY_DEFAULT_PORTING_LAYER_H
 
 
 #define MAX_LANE_NR		6
@@ -48,4 +48,4 @@
 		.valid = 0x1
 	},
 };
-#endif /* __PHY_DEFAULT_PORTING_LAYER_H */
+#endif /* PHY_DEFAULT_PORTING_LAYER_H */