fix(disagg): fix sending KV cache in case of MLA for NIXL backend (#10673)

python/sglang/srt/disaggregation/nixl/conn.py

@@ -547,7 +547,7 @@ class NixlKVManager(CommonKVManager):
             notif = "_".join([str(req.room), "kv", str(chunk_id), str(int(is_last))])
             decode_tp_size = self.decode_kv_args_table[req.agent_name].decode_tp_size
 
-            if decode_tp_size == self.attn_tp_size:
+            if self.is_mla_backend or (decode_tp_size == self.attn_tp_size):
                 kv_xfer_handle = self.send_kvcache(
                     req.agent_name,
                     kv_indices,