[llvm-branch-commits] [llvm] [AMDGPU] Make <2 x bfloat> fneg legal (PR #142870)

[Matt Arsenault via llvm-branch-commits]

https://github.com/arsenm approved this pull request.

LGTM. Should handle fabs and fneg (fabs) in follow ups

https://github.com/llvm/llvm-project/pull/142870