[CPU] add kernel apply_rotary_pos_emb_cpu for Qwen3-VL and Qwen3-Omni (#13121)

Co-authored-by: Ma Mingfei <mingfei.ma@intel.com>

python/sglang/srt/layers/rotary_embedding/utils.py

@@ -7,9 +7,11 @@ from typing import Tuple
 
 import torch
 
-from sglang.srt.utils import get_compiler_backend, is_npu
+from sglang.srt.utils import cpu_has_amx_support, get_compiler_backend, is_cpu, is_npu
 
 _is_npu = is_npu()
+_is_cpu = is_cpu()
+_is_cpu_amx_available = cpu_has_amx_support()
 
 if _is_npu:
     import torch_npu
@@ -128,5 +130,7 @@ def apply_rotary_pos_emb_npu(
 
 if _is_npu:
     apply_rotary_pos_emb = apply_rotary_pos_emb_npu
+elif _is_cpu and _is_cpu_amx_available:
+    apply_rotary_pos_emb = torch.ops.sgl_kernel.apply_rotary_pos_emb_cpu
 else:
     apply_rotary_pos_emb = apply_rotary_pos_emb_native