[NPU] Fix minicpm on MTL (#12599)

python/llm/src/ipex_llm/transformers/npu_models/mp_models_base.py

@@ -29,6 +29,7 @@
 import numpy as np
 from typing import Optional, Any, List
 import numpy.typing as npt
+import os
 
 logger = logging.get_logger(__name__)
 
@@ -492,7 +493,11 @@ def rotate_half(self, x, *, num_heads, seq_len, head_dim):
     def apply_rotary_pos_emb(self, *, q, k, cos, sin, position_ids,
                              num_heads, seq_len, head_dim):
         if position_ids is not None:
-            position_ids = self.squeeze(position_ids)
+            if os.environ.get("IPEX_LLM_NPU_MTL", "0") == "1" or\
+               os.environ.get("IPEX_LLM_NPU_ARL", "0") == "1":
+                position_ids = self.reshape(position_ids, [-1])
+            else:
+                position_ids = self.squeeze(position_ids)
             cos = self.gather(cos, self.convert_to_int32(position_ids), self.constant(1), 0)
             sin = self.gather(sin, self.convert_to_int32(position_ids), self.constant(1), 0)
             cos = self.unsqueeze(cos, [1])