[llvm] [AMDGPU] Reset kill flags for multiple uses of SDWAInst Ops (PR #97135)

[Jeffrey Byrnes via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
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jrbyrnes wrote:

I've just replaced with a reduced MIR test. Without the flag clearing, PeepholeSDWA will attach kill flag to a folded reg, which it will subsequently violate.

https://github.com/llvm/llvm-project/pull/97135