Core: Move PSA APIs veneers into the ns_callable folder

- Move the tfm_psa_api_client.c into ns_callable folder.
- Change tfm_psa_api_client.c to tfm_psa_api_veneers.c.

Change-Id: I0c6f76b3cb719c74ea40526b8d677e86bb39e0b1
Signed-off-by: Edison Ai <edison.ai@arm.com>
diff --git a/secure_fw/ns_callable/CMakeLists.inc b/secure_fw/ns_callable/CMakeLists.inc
index 5bf98da..c60c996 100644
--- a/secure_fw/ns_callable/CMakeLists.inc
+++ b/secure_fw/ns_callable/CMakeLists.inc
@@ -27,6 +27,10 @@
                           "${CMAKE_CURRENT_LIST_DIR}/tfm_audit_veneers.c"
                           "${CMAKE_CURRENT_LIST_DIR}/tfm_platform_veneers.c")
 
+if (TFM_PSA_API)
+	list(APPEND SS_NS_CALLABLE_C_SRC "${CMAKE_CURRENT_LIST_DIR}/tfm_psa_api_veneers.c")
+endif()
+
 #Append all our source files to global lists.
 list(APPEND ALL_SRC_C ${SS_NS_CALLABLE_C_SRC})
 unset(SS_NS_CALLABLE_C_SRC)