[llvm] [AMDGPU] Handle hazard in v_scalef32_sr_fp4_* conversions (PR #118589)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> Ping @arsenm.

This is fine but I would prefer that we have one searchable table instead of 2, as mentioned above. Can do as a follow up 

https://github.com/llvm/llvm-project/pull/118589