Disbled the unit test cases under lstm_eval_test.cc for the XTENSA ta…

…rget.

This is due to API changes during integration code optimization.

tensorflow/lite/micro/kernels/lstm_eval_test.cc

@@ -29,14 +29,17 @@ limitations under the License.
 
 // TODO(b/230666079) enable below tests for xtensa when the xtensa
 // kernel is reconciled with reference kernel
+#if !defined(XTENSA)
 namespace {
 // Test Settings
 constexpr float kTestFloatTolerance = 1e-6f;
 }  // namespace
+#endif // !defined(XTENSA)
 
 TF_LITE_MICRO_TESTS_BEGIN
 // TODO(b/230666079) enable below tests for xtensa when the xtensa
 // kernel is reconciled with reference kernel
+#if !defined(XTENSA)
 TF_LITE_MICRO_TEST(CheckGateOutputFloat) {
   const tflite::testing::GateOutputCheckData<4, 4> gate_output_data =
       tflite::testing::Get2X2GateOutputCheckData();
@@ -451,5 +454,6 @@ TF_LITE_MICRO_TEST(TestLSTMEvalInt16) {
                                        cell_state_tolerance,
                                        int16_node_contents);
 }
+#endif // !defined(XTENSA)
 
 TF_LITE_MICRO_TESTS_END