[llvm] [llvm][AArch64] Improve the cost model for i128 div's (PR #107306)

[Jon Roelofs via llvm-commits]

jroelofs wrote:

I don't need precision for the case I'm trying to avoid: the vectorizer thought this was way too cheap and emitted one in a runtime check. So... the `10` from `getCallInstCost` sounds good to me.

https://github.com/llvm/llvm-project/pull/107306