[llvm] [AMDGPU][SDAG] Legalise v2i32 or/xor/and instructions to make use of 64-bit wide instructions (PR #140694)

[Janek van Oirschot via llvm-commits]

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

LGTM
One last request on my end: fix the github summary or redo the commit message when landing


https://github.com/llvm/llvm-project/pull/140694