quick fix qwen2 fp8 kv cache (#10135)

python/llm/src/bigdl/llm/transformers/models/qwen2.py

@@ -167,6 +167,8 @@ def qwen2_attention_forward_quantized(
 
     if q_len != 1:
         key, value = restore_fp8_kv_cache(key_states, value_states, query_states.dtype)
+        key = repeat_kv(key, self.num_key_value_groups)
+        value = repeat_kv(value, self.num_key_value_groups)
         attn_weights = torch.matmul(query_states, key.transpose(2, 3))
     else:
         import linear_q4_0