mb/{asrock,asus}: Remove unused <stdlib.h>

Change-Id: I14d3579f232b1dcc95b4e0653520686965dbe727
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33889
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/mainboard/asus/f2a85-m/BiosCallOuts.c

@@ -18,7 +18,6 @@
 #include <northbridge/amd/agesa/state_machine.h>
 
 #include <vendorcode/amd/agesa/f15tn/Proc/Fch/FchPlatform.h>
-#include <stdlib.h>
 
 const BIOS_CALLOUT_STRUCT BiosCallouts[] =
 {

src/mainboard/asus/f2a85-m/buildOpts.c

@@ -25,7 +25,6 @@
  *
  */
 
-#include <stdlib.h>
 
 #include <vendorcode/amd/agesa/f15tn/AGESA.h>