Integrate discovery into crypto service provider

Integrates the discovery provider into the crypto provider to
support common discovery operations.  Will initially be used
to discover the max_payload value to allow a client to
use multi-step crypto operations where prior knowledge of
the max_payload size is needed.  This commit also includes
service level tests for discovery.

Signed-off-by: Julian Hall <julian.hall@arm.com>
Change-Id: I0213aeb5a5423b3bec962a6e27d8e83bf8e7a763
diff --git a/deployments/psa-api-test/psa-api-test.cmake b/deployments/psa-api-test/psa-api-test.cmake
index 0a84c65..ecb3a9c 100644
--- a/deployments/psa-api-test/psa-api-test.cmake
+++ b/deployments/psa-api-test/psa-api-test.cmake
@@ -29,6 +29,7 @@
 		"components/common/tlv"
 		"components/service/common/client"
 		"components/service/common/include"
+		"components/service/discovery/client"
 		"components/rpc/common/caller"
 		"components/rpc/common/logging"
 )