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/spm/model_ipc/spm_ipc.c b/secure_fw/spm/model_ipc/spm_ipc.c
index deb7d30..0f25828 100644
--- a/secure_fw/spm/model_ipc/spm_ipc.c
+++ b/secure_fw/spm/model_ipc/spm_ipc.c
@@ -12,7 +12,7 @@
 #include "psa/lifecycle.h"
 #include "tfm_thread.h"
 #include "tfm_wait.h"
-#include "tfm_utils.h"
+#include "utilities.h"
 #include "tfm_internal_defines.h"
 #include "tfm_message_queue.h"
 #include "tfm_spm_hal.h"
@@ -33,7 +33,7 @@
 #include "tfm_pools.h"
 #include "region.h"
 #include "region_defs.h"
-#include "tfm/tfm_spm_services_api.h"
+#include "tfm/tfm_spm_services.h"
 
 #include "secure_fw/partitions/tfm_service_list.inc"
 #include "tfm_spm_db_ipc.inc"