Fix 1 GPU distributed training of cuda device specifying (#8176)
Fix 1 GPU distributed training of cuda device specifying (#8176)

modified: mmdet/utils/util_distribution.py

Co-authored-by: Wenwei Zhang <fabb68f4fed156ebae3036303d1cedae0bf2feeb@users.noreply.github.com>
open-mmlab/mmdetection,open-mmlab/mmdetection