Add mock for libsp/sp_messaging

Add mock_sp_messaging for mocking sp_messaging part of libsp.

Signed-off-by: Imre Kis <imre.kis@arm.com>
Change-Id: I87478027c61b41028682b10e2535a7e14cf6922f
diff --git a/components/messaging/ffa/libsp/mock/component.cmake b/components/messaging/ffa/libsp/mock/component.cmake
index eb0d28c..375cb46 100644
--- a/components/messaging/ffa/libsp/mock/component.cmake
+++ b/components/messaging/ffa/libsp/mock/component.cmake
@@ -14,6 +14,7 @@
 	"${CMAKE_CURRENT_LIST_DIR}/mock_ffa_internal_api.cpp"
 	"${CMAKE_CURRENT_LIST_DIR}/mock_sp_discovery.cpp"
 	"${CMAKE_CURRENT_LIST_DIR}/mock_sp_memory_management.cpp"
+	"${CMAKE_CURRENT_LIST_DIR}/mock_sp_messaging.cpp"
 	"${CMAKE_CURRENT_LIST_DIR}/mock_sp_rxtx.cpp"
 	)