src: Use 'include <string.h>' when appropriate

Drop 'include <string.h>' when it is not used and
add it when it is missing.
Also extra lines removed, or added just before local includes.

Change-Id: Iccac4dbaa2dd4144fc347af36ecfc9747da3de20
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31966
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/drivers/i2c/at24rf08c/at24rf08c.c

@@ -14,7 +14,6 @@
  */
 
 #include <types.h>
-#include <string.h>
 #include <device/device.h>
 #include <device/smbus.h>
 #include <smbios.h>

src/drivers/i2c/da7219/da7219.c

@@ -21,7 +21,7 @@
 #include <device/device.h>
 #include <device/path.h>
 #include <stdint.h>
-#include <string.h>
+
 #include "chip.h"
 
 #if CONFIG(HAVE_ACPI_TABLES)

src/drivers/i2c/max98373/max98373.c

@@ -21,7 +21,6 @@
 #include <device/device.h>
 #include <device/path.h>
 #include <stdint.h>
-#include <string.h>
 #include "chip.h"
 
 #define MAX98373_ACPI_NAME	"MAXI"

src/drivers/i2c/max98927/max98927.c

@@ -21,7 +21,6 @@
 #include <device/device.h>
 #include <device/path.h>
 #include <stdint.h>
-#include <string.h>
 #include "chip.h"
 
 #define MAX98927_ACPI_NAME	"MAXI"

src/drivers/i2c/nau8825/nau8825.c

@@ -21,7 +21,6 @@
 #include <device/device.h>
 #include <device/path.h>
 #include <stdint.h>
-#include <string.h>
 #include "chip.h"
 
 #if CONFIG(HAVE_ACPI_TABLES)

src/drivers/i2c/rt5663/rt5663.c

@@ -21,7 +21,6 @@
 #include <device/device.h>
 #include <device/path.h>
 #include <stdint.h>
-#include <string.h>
 #include "chip.h"
 
 #define RT5663_ACPI_NAME	"RT53"

src/drivers/i2c/tpm/chip.c

@@ -20,7 +20,6 @@
 #include <device/device.h>
 #include <device/path.h>
 #include <stdint.h>
-#include <string.h>
 #include "tpm.h"
 #include "chip.h"
 

src/drivers/i2c/tpm/tis_atmel.c

@@ -14,7 +14,6 @@
 
 #include <arch/early_variables.h>
 #include <stdint.h>
-#include <string.h>
 #include <assert.h>
 #include <commonlib/endian.h>
 #include <console/console.h>