[llvm] [AMDGPU] Fix op_sel settings for v_cvt_scale32_* and v_cvt_sr_* (PR #151286)

[Stanislav Mekhanoshin via llvm-commits]

https://github.com/rampitec commented:

Even if that is so for gfx950, you still need to check gfx1250.

https://github.com/llvm/llvm-project/pull/151286