Add test for ffarpc_caller functions

Cover ffarpc_caller functions with unit tests and harden error
handling code.

Signed-off-by: Imre Kis <imre.kis@arm.com>
Change-Id: I625a0236480e09f1a215e38ff21053470fda311f
diff --git a/deployments/component-test/component-test.cmake b/deployments/component-test/component-test.cmake
index 413615b..f9ddf76 100644
--- a/deployments/component-test/component-test.cmake
+++ b/deployments/component-test/component-test.cmake
@@ -34,6 +34,8 @@
 		"components/rpc/common/test/protocol"
 		"components/rpc/direct"
 		"components/rpc/dummy"
+		"components/rpc/ffarpc/caller/sp"
+		"components/rpc/ffarpc/caller/sp/test"
 		"components/rpc/ffarpc/endpoint"
 		"components/rpc/ffarpc/endpoint/test"
 		"components/service/common/include"