[deepseek_r1] reduce DMA transpose (#1404)

Co-authored-by: Chen Xinyu <xinyu1.chen@intel.com>

Author: yangulei

vllm/attention/backends/mla/utils.py

@@ -445,9 +445,9 @@ def get_scales(layer: LinearBase) -> torch.Tensor:
             self.tp_size = get_tensor_model_parallel_world_size()
         else:
             # Convert from (L, N, V) to (N, L, V)
-            self.W_UV = W_UV.transpose(0, 1)
+            self.W_UV = W_UV.transpose(0, 1).contiguous()
             # Convert from (L, N, P) to (N, P, L)
-            self.W_UK_T = W_UK.permute(1, 2, 0)
+            self.W_UK_T = W_UK.permute(1, 2, 0).contiguous()
 
     @abstractmethod
     def _forward_prefill(