src: Remove unused 'include <string.h>'

Found using:
diff <(git grep -l '#include <string.h>' -- src/) <(git grep -l 'STRINGIFY\|memcpy\|memmove\|memset\|memcmp\|memchr\|strdup\|strconcat\|strnlen\|strlen\|strchr\|strncpy\|strcpy\|strcmp\|strncmp\|strspn\|strcspn\|strtok_r\|strtok\|atol\|strrchr\|skip_atoi\|snprintf' -- src/) |grep -v vendorcode |grep '<'

Change-Id: I12802d0a6254b2fa39d59f485008bb2012f7b32d
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41913
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/acpi/soundwire.c

@@ -7,7 +7,6 @@
 #include <device/soundwire.h>
 #include <stdbool.h>
 #include <stdint.h>
-#include <string.h>
 
 /* Specification-defined prefix for SoundWire properties. */
 #define SDW_PFX "mipi-sdw-"

src/mainboard/dell/optiplex_9010/sch5545_ec.c

@@ -2,7 +2,6 @@
 
 #include <cbfs.h>
 #include <cf9_reset.h>
-#include <string.h>
 #include <option.h>
 #include <arch/io.h>
 #include <cpu/x86/msr.h>

src/mainboard/emulation/qemu-q35/acpi_tables.c

@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <types.h>
-#include <string.h>
 #include <acpi/acpi.h>
 #include <acpi/acpi_gnvs.h>
 #include <arch/ioapic.h>

src/southbridge/amd/agesa/hudson/fadt.c

@@ -4,7 +4,6 @@
  * ACPI - create the Fixed ACPI Description Tables (FADT)
  */
 
-#include <string.h>
 #include <console/console.h>
 #include <acpi/acpi.h>
 #include <device/device.h>

src/southbridge/amd/cimx/sb800/fadt.c

@@ -5,8 +5,6 @@
  * ACPI - create the Fixed ACPI Description Tables (FADT)
  */
 
-
-#include <string.h>
 #include <console/console.h>
 #include <acpi/acpi.h>
 #include <arch/io.h>

src/southbridge/amd/pi/hudson/fadt.c

@@ -4,7 +4,6 @@
  * ACPI - create the Fixed ACPI Description Tables (FADT)
  */
 
-#include <string.h>
 #include <console/console.h>
 #include <acpi/acpi.h>
 #include <device/device.h>

src/southbridge/intel/i82371eb/fadt.c

@@ -4,7 +4,6 @@
  * Based on src/southbridge/via/vt8237r/vt8237_fadt.c
  */
 
-#include <string.h>
 #include <acpi/acpi.h>
 #include <device/device.h>
 #include <device/pci.h>

src/southbridge/intel/i82801dx/fadt.c

@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <string.h>
 #include <device/pci_ops.h>
 #include <acpi/acpi.h>
 #include <version.h>

src/southbridge/intel/i82801gx/fadt.c

@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <string.h>
 #include <device/pci_ops.h>
 #include <acpi/acpi.h>
 #include <cpu/x86/smm.h>

src/southbridge/intel/i82801ix/fadt.c

@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <string.h>
 #include <device/pci_ops.h>
 #include <acpi/acpi.h>
 #include <cpu/x86/smm.h>

src/southbridge/intel/i82801jx/fadt.c

@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <string.h>
 #include <device/pci_ops.h>
 #include <acpi/acpi.h>
 #include <cpu/x86/smm.h>