fix points_in_box bug.

Author: momo609

mmcv/ops/points_in_boxes.py

@@ -47,8 +47,9 @@ def points_in_boxes_part(points: Tensor, boxes: Tensor) -> Tensor:
     points_device = points.get_device()
     assert points_device == boxes.get_device(), \
         'Points and boxes should be put on the same device'
-    if torch.cuda.current_device() != points_device:
-        torch.cuda.set_device(points_device)
+    if points_device != 'npu':
+        if torch.cuda.current_device() != points_device:
+            torch.cuda.set_device(points_device)
 
     ext_module.points_in_boxes_part_forward(boxes.contiguous(),
                                             points.contiguous(),