Fix its tests in non-psa targets

Author: Michael Schwarcz

TESTS/psa/prot_internal_storage/its_reset/COMPONENT_PSA_SRV_EMUL/test_pits.c

@@ -15,6 +15,10 @@
  * limitations under the License.
  */
 
+#ifndef TARGET_PSA
+#error [NOT_SUPPORTED] ITS tests can run only on PSA-enabled targets.
+#endif // TARGET_PSA
+
 #include "test_pits.h"
 #include "test_pits_impl.h"