[Feat] Enable PDL automatically on Hopper architecture (#5981)

sgl-kernel/python/sgl_kernel/utils.py

@@ -39,3 +39,10 @@ def _to_tensor_scalar_tuple(x):
         return (x, 0)
     else:
         return (None, x)
+
+
+def is_hopper_arch() -> bool:
+    # Hopper arch's compute capability == 9.0
+    device = torch.cuda.current_device()
+    major, minor = torch.cuda.get_device_capability(device)
+    return major == 9