libsp: Add ffa_internal_api.h mock implementation

ffa_svc calls can be expected from tests instead of real SVC calls to
decouple platform dependency.

Signed-off-by: Imre Kis <imre.kis@arm.com>
Change-Id: I410a5576020871b65010e1f003ea57b73f19a71a
diff --git a/components/messaging/ffa/libsp/tests.cmake b/components/messaging/ffa/libsp/tests.cmake
index f140b60..77153ff 100644
--- a/components/messaging/ffa/libsp/tests.cmake
+++ b/components/messaging/ffa/libsp/tests.cmake
@@ -17,3 +17,16 @@
 	COMPILE_DEFINITIONS
 		-DARM64
 )
+
+unit_test_add_suite(
+	NAME libsp_mock_ffa_internal_api
+	SOURCES
+		${CMAKE_CURRENT_LIST_DIR}/test/mock_ffa_internal_api.cpp
+		${CMAKE_CURRENT_LIST_DIR}/test/test_mock_ffa_internal_api.cpp
+	INCLUDE_DIRECTORIES
+		${CMAKE_CURRENT_LIST_DIR}/include/
+		${PROJECT_PATH}/components/common/utils/include
+	COMPILE_DEFINITIONS
+		-DARM64
+)
+