spmc: hypervisor calls moved to a separate module

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I285ffc684aa780246468355add9d03c1b5b8fefb
diff --git a/spm/cactus/cactus_tests/cactus_test_ffa.c b/spm/cactus/cactus_tests/cactus_test_ffa.c
index c1ba783..2ade7bd 100644
--- a/spm/cactus/cactus_tests/cactus_test_ffa.c
+++ b/spm/cactus/cactus_tests/cactus_test_ffa.c
@@ -11,6 +11,7 @@
 #include <cactus_platform_def.h>
 #include <ffa_endpoints.h>
 #include <sp_helpers.h>
+#include <spm_helpers.h>
 #include <spm_common.h>
 
 #include <lib/libc/string.h>