[Intel GPU] fix triton-mla attention on XPU by limiting max_kv_splits to 8 which is default (#28646)

Signed-off-by: P V R K Jyothendra Varma <polisetty.v.r.k.jyothendra.varma@intel.com>
Co-authored-by: Ma Mingfei <mingfei.ma@intel.com>

python/sglang/srt/layers/attention/triton_backend.py

@@ -40,11 +40,13 @@ from sglang.srt.utils import (
     is_cuda,
     is_gfx95_supported,
     is_gfx942_supported,
+    is_xpu,
     next_power_of_2,
 )
 
 _is_cuda = is_cuda()
 _is_gfx942 = is_gfx942_supported()
+_is_xpu = is_xpu()
 
 if _is_cuda:
     from sgl_kernel.utils import is_arch_support_pdl
@@ -202,7 +204,7 @@ class TritonAttnBackend(AttentionBackend):
             "SGLANG_TRITON_DECODE_ATTN_STATIC_KV_SPLITS", "false"
         )
         self.max_kv_splits = model_runner.server_args.triton_attention_num_kv_splits
-        if self.use_mla:
+        if self.use_mla and not _is_xpu:
             self.max_kv_splits = _mla_decode_kv_splits_cap(
                 self.max_kv_splits,
                 self.device_core_count,