[llvm] [LoopDataPrefetch] Enable handling of target-specific memory intrinsics (PR #207358)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm commented:

Shouldn't add any of the new options or target knobs, you can do this solely based on the existing target intrinsic recognition 

https://github.com/llvm/llvm-project/pull/207358