[llvm] AMDGPU: Use OtherPredicates for v_dot2_bf16_bf16(f16_f16) pseudo (PR #84354)

[Stanislav Mekhanoshin via llvm-commits]

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

LGTM, but this is really unfortunate. Can we try to address dpp predicates?

https://github.com/llvm/llvm-project/pull/84354