Fixed insert_fake_quantize() with empty hw_config (#12676)

tools/pot/openvino/tools/pot/graph/passes.py

@@ -872,9 +872,10 @@ def insert_fake_quantize(graph, node, ports=None, names=None, fq_types=None, hw_
             fq_group = fq_type[idx]
 
         fq_configs = []
-        node_type = get_hardware_config_operation_type(node, list(hw_config.keys()))
-        if hw_config is not None and hw_config[node_type]:
-            fq_configs = hw_config[node_type][fq_group]
+        if hw_config is not None:
+            node_type = get_hardware_config_operation_type(node, list(hw_config.keys()))
+            if hw_config[node_type]:
+                fq_configs = hw_config[node_type][fq_group]
 
         fq_options = {
             'fq_group': fq_group,