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/include/ffm/psa_api.h b/secure_fw/spm/include/ffm/psa_api.h
index 9f8354b..868c178 100644
--- a/secure_fw/spm/include/ffm/psa_api.h
+++ b/secure_fw/spm/include/ffm/psa_api.h
@@ -10,6 +10,7 @@
 
 #include <stdint.h>
 #include <stdbool.h>
+#include "config_spm.h"
 #include "psa/client.h"
 #include "psa/service.h"