[NeuralChat] Fix magicoder model tokenizer issue (#1075)

* fix magicoder tokenizer issue

Signed-off-by: lvliang-intel <liang1.lv@intel.com>

Author: lvliang-intel

intel_extension_for_transformers/neural_chat/models/model_utils.py

@@ -441,7 +441,8 @@ def load_model(
     try:
         tokenizer = AutoTokenizer.from_pretrained(
             tokenizer_name,
-            use_fast=False if config.model_type == "llama" else True,
+            use_fast=False if (re.search("llama", model_name, re.IGNORECASE)
+                or re.search("neural-chat-7b-v2", model_name, re.IGNORECASE)) else True,
             use_auth_token=hf_access_token,
             trust_remote_code=True if (re.search("qwen", model_name, re.IGNORECASE) or \
                 re.search("chatglm", model_name, re.IGNORECASE)) else False,