Address failures on td2 asics for fdb mac move test (#9777)

Signed-off-by: Neetha John <nejo@microsoft.com>

tests/fdb/conftest.py

@@ -36,6 +36,9 @@ def set_polling_interval(duthost):
     wait(wait_time, "Waiting {} sec for CRM counters to become updated".format(wait_time))
 
 @pytest.fixture(scope='module')
-def get_function_conpleteness_level(pytestconfig):
-    return pytestconfig.getoption("--completeness_level")
-
+def get_function_conpleteness_level(pytestconfig, duthost):
+    asic_name = duthost.get_asic_name()
+    if asic_name in ['td2']:
+        return None
+    else:
+        return pytestconfig.getoption("--completeness_level")