SPM: Set features with config header file

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Ie9dd99456a3ad8cb3d7601d484c0f396b201c448
diff --git a/secure_fw/spm/ffm/utilities.c b/secure_fw/spm/ffm/utilities.c
index cdc5d7c..c9a0c67 100644
--- a/secure_fw/spm/ffm/utilities.c
+++ b/secure_fw/spm/ffm/utilities.c
@@ -5,6 +5,7 @@
  *
  */
 #include <inttypes.h>
+#include "config_spm.h"
 #include "fih.h"
 #include "utilities.h"
 #include "tfm_hal_platform.h"