[qwen3 next ]add ascend c casual_conv1d_fn (#6661)

### What this PR does / why we need it?
add ascend c casual_conv1d_fn

- vLLM version: v0.15.0
- vLLM main:
13397841ab
---------
Signed-off-by: ZT-AIA <1028681969@qq.com>
Signed-off-by: ZT-AIA <63220130+ZT-AIA@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

csrc/causal_conv1d/op_host/tiling_util.cpp

@@ -0,0 +1,31 @@
+/**
+ * Copyright (c) 2025 Huawei Technologies Co., Ltd.
+ * This program is free software, you can redistribute it and/or modify it under the terms and conditions of
+ * CANN Open Software License Agreement Version 2.0 (the "License").
+ * Please refer to the License for details. You may not use this file except in compliance with the License.
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
+ * See LICENSE in the root of the software repository for the full text of the License.
+ */
+
+/*!
+ * \file tiling_util.cpp
+ * \brief
+ */
+
+#include "../tiling_base/tiling_util.h"
+namespace Ops {
+namespace Transformer {
+namespace OpTiling {
+static const gert::Shape g_vec_1_shape = {1};
+
+const gert::Shape &EnsureNotScalar(const gert::Shape &inShape)
+{
+    if (inShape.IsScalar()) {
+        return g_vec_1_shape;
+    }
+    return inShape;
+}
+} // namespace OpTiling
+} // namespace Transformer
+} // namespace Ops