bugfix revise interface get cpu copy for npu mem pool to align with gpu (#29146)

python/sglang/srt/hardware_backend/npu/memory_pool_npu.py

@@ -506,7 +506,7 @@ class NPUMLATokenToKVPool(MLATokenToKVPool):
             out.append(layer_chunks)
         return out
 
-    def get_cpu_copy(self, indices):
+    def get_cpu_copy(self, indices, mamba_indices=None):
         torch.npu.synchronize()
         buf_of_layers = []
         has_ik = self.index_head_dim is not None
@@ -524,7 +524,7 @@ class NPUMLATokenToKVPool(MLATokenToKVPool):
         torch.npu.synchronize()
         return kv_cache_cpu
 
-    def load_cpu_copy(self, kv_cache_cpu, indices):
+    def load_cpu_copy(self, kv_cache_cpu, indices, mamba_indices=None):
         torch.npu.synchronize()
         chunk_size = self.cpu_offloading_chunk_size
         has_ik = self.index_head_dim is not None