[llvm] [AMDGPU] Fix encoding of VOP3P dpp on GFX11 and GFX12 (PR #82710)

[Stanislav Mekhanoshin via llvm-commits]

rampitec wrote:

As a side note: I have written scripts to produce MC tests. But I am verifying produced bits with my naked eyes before I submit these script results. Yes, my eyes are bleeding. This is the path.

https://github.com/llvm/llvm-project/pull/82710