GitLab

* [Feature] Support NmsRotated with cambricon MLU backend

* [Feature] remove foolproofs in nms_rotated_mlu.cpp

* [Feature] fix lint in test_nms_rotated.py

* [Feature] fix kMLU not found in nms_rotated.cpp

* [Feature] modify mlu support in nms.py

* [Feature] modify nms_rotated support in ops.md

* [Feature] modify ops/nms.py