Core: Change filenames of SPM

- Change SPM API filename of IPC model to 'spm_ipc.c'.
- Change SPM API filename of library model to 'spm_func.c'.

Change-Id: Ic15f93d0c88f7851c68133bf3630c32a23cb8666
Signed-off-by: Mingyang Sun <mingyang.sun@arm.com>
diff --git a/secure_fw/spm/CMakeLists.inc b/secure_fw/spm/CMakeLists.inc
index 75717ba..23d8e83 100644
--- a/secure_fw/spm/CMakeLists.inc
+++ b/secure_fw/spm/CMakeLists.inc
@@ -1,5 +1,5 @@
 #-------------------------------------------------------------------------------
-# Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+# Copyright (c) 2017-2020, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -27,9 +27,9 @@
 set (SS_SPM_C_SRC "${SS_SPM_DIR}/spm_api.c")
 
 if(TFM_PSA_API)
-	list(APPEND SS_SPM_C_SRC "${SS_SPM_DIR}/spm_api_ipc.c")
+	list(APPEND SS_SPM_C_SRC "${SS_SPM_DIR}/spm_ipc.c")
 else()
-	list(APPEND SS_SPM_C_SRC "${SS_SPM_DIR}/spm_api_func.c")
+	list(APPEND SS_SPM_C_SRC "${SS_SPM_DIR}/spm_func.c")
 endif()
 
 #Append all our source files to global lists.