Tune PermutationForDeposition for MI250X

[AlexanderSinn]

Summary

PermutationForDeposition was initially developed for A100. A few tweaks can be made to improve performance on MI250X, which has a smaller cache but is much less sensitive to atomic add congestion.

TODO: more tests and code comments

Additional background

Checklist

The proposed changes:

• [ ] fix a bug or incorrect behavior in AMReX
• [ ] add new capabilities to AMReX
• [ ] changes answers in the test suite to more than roundoff level
• [ ] are likely to significantly affect the results of downstream AMReX users
• [ ] include documentation in the code and/or rst files, if appropriate