[diffusion] platform: support Intel XPU (#17920)

Signed-off-by: sushil.dubey <sushil.dubey@intel.com>
Signed-off-by: Sushil Dubey <sushil.dubey@intel.com>
Co-authored-by: Ma Mingfei <mingfei.ma@intel.com>

python/sglang/jit_kernel/diffusion/triton/scale_shift.py

@@ -338,7 +338,7 @@ def fuse_scale_shift_kernel(
     block_l: int = 128,
     block_c: int = 128,
 ):
-    assert x.is_cuda and scale.is_cuda
+    assert (x.is_cuda and scale.is_cuda) or (x.is_xpu and scale.is_xpu)
     assert x.is_contiguous()
 
     B, L, C = x.shape