SST: Rename get_attributes APIs to get_info

This patch renames get_attributes functions to get_info, and updates
the SST code as follows:
- rename tfm_sst_attribs_t to tfm_sst_asset_info_t
- rename sst_asset_infoi_t to sst_asset_policy_t in
  sst_asset_management
- add sst_core_obj_info_t in sst_core
- update sst service APIs and code to accomodate it to the new types
  and type names
- update dependant tests to accomodate them to the new names

Change-Id: Ifa0e56c3c15c7de40d6af4aa3f96c8bd7eae85f2
Signed-off-by: Marc Moreno <marc.morenoberengue@arm.com>
diff --git a/interface/include/tfm_ns_svc.h b/interface/include/tfm_ns_svc.h
index 178e75c..28c7589 100644
--- a/interface/include/tfm_ns_svc.h
+++ b/interface/include/tfm_ns_svc.h
@@ -43,7 +43,7 @@
 #define LIST_SVC_DISPATCHERS \
     X(SVC_TFM_SST_GET_HANDLE, tfm_sst_svc_get_handle) \
     X(SVC_TFM_SST_CREATE, tfm_sst_svc_create) \
-    X(SVC_TFM_SST_GET_ATTRIBUTES, tfm_sst_svc_get_attributes) \
+    X(SVC_TFM_SST_GET_INFO, tfm_sst_svc_get_info) \
     X(SVC_TFM_SST_READ, tfm_sst_svc_read) \
     X(SVC_TFM_SST_WRITE, tfm_sst_svc_write) \
     X(SVC_TFM_SST_DELETE, tfm_sst_svc_delete) \