refactor(smc): group all smc tests

Move and group all smccc related tests to tests-smc*
file.

Change-Id: I34eb4dc906b558badab2c9356bb316d92f40914a
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/tftf/tests/tests-psci.mk b/tftf/tests/tests-psci.mk
index 0be0cef..597ee8c 100644
--- a/tftf/tests/tests-psci.mk
+++ b/tftf/tests/tests-psci.mk
@@ -1,15 +1,9 @@
 #
-# Copyright (c) 2018, Arm Limited. All rights reserved.
+# Copyright (c) 2018-2024, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-TESTS_SOURCES	+=								\
-	$(addprefix tftf/tests/runtime_services/standard_service/,		\
-		query_std_svc.c 						\
-		unknown_smc.c 							\
-	)
-
 TESTS_SOURCES	+=						\
 	$(addprefix tftf/tests/runtime_services/standard_service/psci/api_tests/, \
 		affinity_info/test_psci_affinity_info.c		\