src: Use include <delay.h> when appropriate

Change-Id: I23bc0191ca8fcd88364e5c08be7c90195019e399
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32012
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-by: David Guckian

src/mainboard/packardbell/ms2290/mainboard.c

@@ -19,7 +19,6 @@
 #include <console/console.h>
 #include <device/device.h>
 #include <arch/io.h>
-#include <delay.h>
 #include <device/pci_def.h>
 #include <device/pci_ops.h>
 #include <northbridge/intel/nehalem/nehalem.h>

src/mainboard/packardbell/ms2290/romstage.c

@@ -28,7 +28,6 @@
 #include <cpu/x86/bist.h>
 #include <cpu/intel/romstage.h>
 #include <ec/acpi/ec.h>
-#include <delay.h>
 #include <timestamp.h>
 #include <arch/acpi.h>
 

src/mainboard/packardbell/ms2290/smihandler.c

@@ -24,7 +24,6 @@
 #include <northbridge/intel/nehalem/nehalem.h>
 #include <cpu/intel/model_2065x/model_2065x.h>
 #include <ec/acpi/ec.h>
-#include <delay.h>
 
 static void mainboard_smm_init(void)
 {