src/ec: Use 'include <stdlib.h>' when appropriate

Change-Id: Ifdb2dee08da45d698174583ee5ed44bf5a0243ff
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32823
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/ec/compal/ene932/ec.c

@@ -19,7 +19,6 @@
 #include <console/console.h>
 #include <device/device.h>
 #include <device/pnp.h>
-#include <stdlib.h>
 #include <arch/io.h>
 #include <delay.h>
 #include <pc80/keyboard.h>

src/ec/google/wilco/mailbox.c

@@ -18,7 +18,6 @@
 #include <delay.h>
 #include <ec/google/common/mec.h>
 #include <stdint.h>
-#include <stdlib.h>
 #include <string.h>
 #include <timer.h>
 #include <types.h>

src/ec/kontron/it8516e/ec.c

@@ -13,7 +13,6 @@
  * GNU General Public License for more details.
  */
 
-#include <stdlib.h>
 #include <console/console.h>
 #include <device/device.h>
 #include <device/pnp.h>

src/ec/lenovo/h8/h8.c

@@ -18,7 +18,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <ec/acpi/ec.h>
-#include <stdlib.h>
 #include <string.h>
 #include <smbios.h>
 #include <pc80/mc146818rtc.h>

src/ec/lenovo/pmh7/pmh7.c

@@ -17,7 +17,6 @@
 #include <console/console.h>
 #include <device/device.h>
 #include <device/pnp.h>
-#include <stdlib.h>
 #include <pc80/mc146818rtc.h>
 #include <delay.h>
 #include <types.h>

src/ec/quanta/ene_kb3940q/ec.c

@@ -22,7 +22,6 @@
 #include <device/pnp.h>
 #include <delay.h>
 #include <elog.h>
-#include <stdlib.h>
 #include <pc80/keyboard.h>
 
 #include "ec.h"

src/ec/quanta/it8518/ec.c

@@ -20,7 +20,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
 
 #include "ec.h"
 #include "chip.h"

src/ec/roda/it8518/ec.c

@@ -18,7 +18,6 @@
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
 #include <ec/acpi/ec.h>
-#include <stdlib.h>
 #include <delay.h>
 
 #include "chip.h"