Update default int4 config for llama-2-7b-chat-hf (#1216)

* Update default int4 config for llama-2-7b-chat-hf

* Update configuration.py

Author: nikita-savelyevv

optimum/intel/openvino/configuration.py

@@ -67,7 +67,15 @@ class OVQuantizationMethod(str, Enum):
         "quant_method": OVQuantizationMethod.AWQ,
     },
     "meta-llama/Llama-2-7b-hf": {"bits": 4, "sym": True, "group_size": 128, "ratio": 0.6},
-    "meta-llama/Llama-2-7b-chat-hf": {"bits": 4, "sym": True, "group_size": 128, "ratio": 0.8},
+    "meta-llama/Llama-2-7b-chat-hf": {
+        "bits": 4,
+        "sym": True,
+        "group_size": 128,
+        "ratio": 1.0,
+        "dataset": "wikitext2",
+        "quant_method": OVQuantizationMethod.AWQ,
+        "scale_estimation": True,
+    },
     "meta-llama/Llama-2-13b-chat-hf": {"bits": 4, "sym": True, "group_size": 64, "ratio": 0.8},
     "stabilityai/stablelm-3b-4e1t": {
         "bits": 4,