llama4 npu adapt (#17123)

Co-authored-by: cy <chenyang08056032@163.com>
Co-authored-by: sglang-npu-bot <sglangnpu@163.com>

test/registered/ascend/llm_models/test_ascend_llama4_scount_17b_16e.py

@@ -0,0 +1,31 @@
+import unittest
+
+from sglang.test.ascend.gsm8k_ascend_mixin import GSM8KAscendMixin
+from sglang.test.ci.ci_register import register_npu_ci
+from sglang.test.test_utils import CustomTestCase
+
+register_npu_ci(est_time=400, suite="nightly-4-npu-a3", nightly=True)
+
+
+class TestLlama4(GSM8KAscendMixin, CustomTestCase):
+    model = (
+        "/root/.cache/modelscope/hub/models/meta-llama/Llama-4-Scout-17B-16E-Instruct"
+    )
+    accuracy = 0.9
+    other_args = [
+        "--chat-template",
+        "llama-4",
+        "--tp-size",
+        4,
+        "--mem-fraction-static",
+        "0.9",
+        "--context-length",
+        "8192",
+        "--attention-backend",
+        "ascend",
+        "--disable-cuda-graph",
+    ]
+
+
+if __name__ == "__main__":
+    unittest.main()