[llvm] AMDGPU: Add some leaf intrinsics to isAlwaysUniform (PR #101925)

[Stanislav Mekhanoshin via llvm-commits]

https://github.com/rampitec commented:

I think uniformity analysis will always tell it is uniform because it has no divergent arguments. Do you think searching this table is faster?

https://github.com/llvm/llvm-project/pull/101925