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/include/spm_api.h b/secure_fw/spm/include/spm_api.h
index 1825a33..968f628 100644
--- a/secure_fw/spm/include/spm_api.h
+++ b/secure_fw/spm/include/spm_api.h
@@ -165,6 +165,11 @@
     struct tfm_msg_queue_t msg_queue;        /* Message queue                */
     struct tfm_list_node_t list;             /* For list operation           */
 };
+
+enum tfm_memory_access_e {
+    TFM_MEMORY_ACCESS_RO = 1,
+    TFM_MEMORY_ACCESS_RW = 2,
+};
 #endif /* ifdef(TFM_PSA_API) */
 
 /*********************** common definitions ***********************/