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/drivers/spi/spi_flash.c

@@ -11,14 +11,13 @@
 #include <assert.h>
 #include <boot_device.h>
 #include <cpu/x86/smm.h>
-#include <delay.h>
 #include <stdlib.h>
 #include <string.h>
 #include <spi-generic.h>
 #include <spi_flash.h>
+#include <timer.h>
 
 #include "spi_flash_internal.h"
-#include <timer.h>
 
 static void spi_flash_addr(u32 addr, u8 *cmd)
 {