Build: Add option to enable or disable Audit Log

Adds a build option that makes it possible to enable or disable the
TF-M Audit Log partition. The option TFM_PARTITION_AUDIT_LOG can be
provided in the CMake configure command, and is enabled by default if
not supplied.

Change-Id: Ib60f22aeb62652e34a1ac43a61154288e6d989b3
Signed-off-by: Jamie Fox <jamie.fox@arm.com>
diff --git a/secure_fw/ns_callable/CMakeLists.inc b/secure_fw/ns_callable/CMakeLists.inc
index c60c996..91f803a 100644
--- a/secure_fw/ns_callable/CMakeLists.inc
+++ b/secure_fw/ns_callable/CMakeLists.inc
@@ -24,9 +24,12 @@
 endif()
 
 set (SS_NS_CALLABLE_C_SRC "${CMAKE_CURRENT_LIST_DIR}/tfm_veneers.c"
-                          "${CMAKE_CURRENT_LIST_DIR}/tfm_audit_veneers.c"
                           "${CMAKE_CURRENT_LIST_DIR}/tfm_platform_veneers.c")
 
+if (TFM_PARTITION_AUDIT_LOG)
+	list(APPEND SS_NS_CALLABLE_C_SRC "${CMAKE_CURRENT_LIST_DIR}/tfm_audit_veneers.c")
+endif()
+
 if (TFM_PSA_API)
 	list(APPEND SS_NS_CALLABLE_C_SRC "${CMAKE_CURRENT_LIST_DIR}/tfm_psa_api_veneers.c")
 endif()