[llvm] [X86] SimplifyDemandedBitsForTargetNode - add handling for VPMADD52L/VPMADD52H (PR #155494)

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XChy wrote:

Thanks for your review. I would like to work on the constant fold of VPMADD52L/VPMADD52H. Can you assign it to me? Or I post an issue myself.

https://github.com/llvm/llvm-project/pull/155494