[llvm] [AArch64] Lower partial add reduction to udot or svdot (PR #101010)

[David Green via llvm-commits]

https://github.com/davemgreen commented:

Could this remove the shouldExpandPartialReductionIntrinsic and always emit a node, that gets expanded as needed like the rest of DAG?

https://github.com/llvm/llvm-project/pull/101010