[llvm] [Hexagon] Have fast-math-libcalls.ll use the hexagonv65 cpu (PR #149647)

[Brian Cain via llvm-commits]

================

----------------
androm3da wrote:

> Are there any plans to remove these old versions from the upstream code?

They're pretty benign IIUC - not much difficulty imposed by their presence. So there's little reason to remove them.

https://github.com/llvm/llvm-project/pull/149647