SPM: Sort out tfm_secure_api.c file

- Rename 'tfm_utils.h' to 'utilities.h'.
- Rename 'tfm_spm_services_api.h'to 'tfm_spm_services.h'.
- Move 'tfm_secure_api.c' from spm/runtime to spm/model_func and
  sort out the content

Change-Id: Ie8831e2b1430eab6a2edc9b6c0487ef14f2fafc6
Signed-off-by: Summer Qin <summer.qin@arm.com>
diff --git a/secure_fw/partitions/initial_attestation/tfm_attestation.c b/secure_fw/partitions/initial_attestation/tfm_attestation.c
index 0ac143a..a49714b 100644
--- a/secure_fw/partitions/initial_attestation/tfm_attestation.c
+++ b/secure_fw/partitions/initial_attestation/tfm_attestation.c
@@ -7,6 +7,7 @@
 
 #include "tfm_api.h"
 #include "tfm_secure_api.h"
+#include "tfm/tfm_spm_services.h"
 #include "attestation.h"
 #include "psa/initial_attestation.h"
 #include "tfm_boot_status.h"