soc/intel: Remove unused <string.h>

Found using following command:
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(\|strstr(\|strtok_r(\|strtok(\|atol(\|strrchr(\|skip_atoi(\|vsnprintf(\|snprintf(' -- src/)

Change-Id: Iae90ff482f534d8de2a519619c20a019d054e700
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60553
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/soc/intel/alderlake/acpi.c

@@ -18,7 +18,6 @@
 #include <soc/pm.h>
 #include <soc/soc_chip.h>
 #include <soc/systemagent.h>
-#include <string.h>
 #include <types.h>
 
 /*

src/soc/intel/cannonlake/acpi.c

@@ -17,7 +17,6 @@
 #include <soc/pci_devs.h>
 #include <soc/pm.h>
 #include <soc/systemagent.h>
-#include <string.h>
 
 #include "chip.h"
 

src/soc/intel/common/block/irq/irq.c

@@ -11,7 +11,6 @@
 #include <soc/pci_devs.h>
 #include <southbridge/intel/common/acpi_pirq_gen.h>
 #include <stdlib.h>
-#include <string.h>
 #include <types.h>
 
 #define MIN_SHARED_IRQ		16

src/soc/intel/elkhartlake/acpi.c

@@ -18,7 +18,6 @@
 #include <soc/pm.h>
 #include <soc/soc_chip.h>
 #include <soc/systemagent.h>
-#include <string.h>
 
 /*
  * List of supported C-states in this processor.

src/soc/intel/elkhartlake/fsp_params.c

@@ -14,7 +14,6 @@
 #include <soc/pci_devs.h>
 #include <soc/ramstage.h>
 #include <soc/soc_chip.h>
-#include <string.h>
 #include <types.h>
 
 /* SATA DEVSLP idle timeout default values */

src/soc/intel/elkhartlake/romstage/fsp_params.c

@@ -9,7 +9,6 @@
 #include <soc/pci_devs.h>
 #include <soc/romstage.h>
 #include <soc/soc_chip.h>
-#include <string.h>
 
 static void soc_memory_init_params(FSP_M_CONFIG *m_cfg,
 		const struct soc_intel_elkhartlake_config *config)

src/soc/intel/icelake/acpi.c

@@ -15,7 +15,6 @@
 #include <soc/pm.h>
 #include <soc/soc_chip.h>
 #include <soc/systemagent.h>
-#include <string.h>
 
 /*
  * List of supported C-states in this processor.

src/soc/intel/jasperlake/acpi.c

@@ -18,7 +18,6 @@
 #include <soc/pm.h>
 #include <soc/soc_chip.h>
 #include <soc/systemagent.h>
-#include <string.h>
 
 /*
  * List of supported C-states in this processor.

src/soc/intel/jasperlake/romstage/fsp_params.c

@@ -9,7 +9,6 @@
 #include <soc/pci_devs.h>
 #include <soc/romstage.h>
 #include <soc/soc_chip.h>
-#include <string.h>
 
 static void soc_memory_init_params(FSP_M_CONFIG *m_cfg,
 		const struct soc_intel_jasperlake_config *config)

src/soc/intel/tigerlake/acpi.c

@@ -18,7 +18,6 @@
 #include <soc/pm.h>
 #include <soc/soc_chip.h>
 #include <soc/systemagent.h>
-#include <string.h>
 
 /*
  * List of supported C-states in this processor.