[llvm] [AArch64] Add missing ASIMD FP convert instructions to scheduling model (PR #115146)

[Rin Dobrescu via llvm-commits]

Rin18 wrote:

> Thanks for catching this. We seem to be missing some test coverage for some of the patterns modified, but I don't think this is critical. LGTM!

Yes, you're right. Although the missing instructions are at least clustered together so as long as one is covered, the others should be too. I'll merge this as it is. We can always add the missing ones later.

https://github.com/llvm/llvm-project/pull/115146