[clang] [llvm] [polly] [X86] Remove knl/knm specific ISAs supports (PR #92883)

[Simon Pilgrim via llvm-commits]

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@@ -139,6 +139,9 @@ Changes to the Windows Target
 Changes to the X86 Backend
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+- Removed knl/knm specific ISA lowerings: AVX512PF, AVX512ER, PREFETCHWT1,
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RKSimon wrote:

"ISA intrinsics" instead?

https://github.com/llvm/llvm-project/pull/92883