[llvm] [ARM] Add NEON support for ISD::ABDS/ABDU nodes. (PR #94504)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

> Sure lets do it. LGTM

Cheers - it turned into a bit of chicken-and-egg situation :)

https://github.com/llvm/llvm-project/pull/94504