Tegra194: disable some system suspend test cases

This patch disables the following test cases from the PSCI System
Suspend Validation test suite:

* system suspend from all cores
* Suspend system with cores in suspend

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Change-Id: I5f6fcf01ad3b9012fac684f9b3beb87827148de0
diff --git a/plat/nvidia/tegra194/tests_to_skip.txt b/plat/nvidia/tegra194/tests_to_skip.txt
index 929820a..a0f3749 100644
--- a/plat/nvidia/tegra194/tests_to_skip.txt
+++ b/plat/nvidia/tegra194/tests_to_skip.txt
@@ -4,8 +4,16 @@
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
+################################################################################
+# Disable the following tests from tests-psci.xml as a result
+################################################################################
+
 # Tegra194 platforms cannot be woken up from CPU_SUSPEND by an SGI
 PSCI Affinity Info/Affinity info level0 powerdown
 PSCI CPU Suspend/CPU suspend to standby at level 0
 PSCI CPU Suspend/CPU suspend to standby at level 1
 PSCI CPU Suspend/CPU suspend to standby at level 2
+PSCI System Suspend Validation/Suspend system with cores in suspend
+
+# Tegra194 platforms enter system suspend only from the boot core
+PSCI System Suspend Validation/system suspend from all cores