plat: tegra: include standard and validation tests

When build parameter TESTS is set to tegra194, standard tests will
run with platform specific tests.

Signed-off-by: anzhou <anzhou@nvidia.com>
Signed-off-by: Bo Yan <byan@nvidia.com>
Change-Id: If8c2694ce0a9caaa12b59980956a51ed286ea314
diff --git a/tftf/tests/tests-tegra194.mk b/tftf/tests/tests-tegra194.mk
index a867412..ef6d848 100644
--- a/tftf/tests/tests-tegra194.mk
+++ b/tftf/tests/tests-tegra194.mk
@@ -13,3 +13,6 @@
 	test_ras_uncorrectable.c						\
 	serror_handler.S							\
 )
+
+include tftf/tests/tests-standard.mk
+TESTS_SOURCES += $(sort ${TESTS_SOURCES})