Add RPC service interface

Add interface for implementing services in an RPC endpoint.

Signed-off-by: Imre Kis <imre.kis@arm.com>
Change-Id: Id2639afa003da46230c93e6e55ff2ffa781df53d
diff --git a/deployments/component-test/component-test.cmake b/deployments/component-test/component-test.cmake
index 2724ccf..d96e774 100644
--- a/deployments/component-test/component-test.cmake
+++ b/deployments/component-test/component-test.cmake
@@ -42,6 +42,7 @@
 		"components/config/ramstore/test"
 		"components/messaging/ffa/libsp/mock"
 		"components/rpc/common/caller"
+		"components/rpc/common/endpoint"
 		"components/rpc/common/interface"
 		"components/rpc/common/demux"
 		"components/rpc/common/test"