[llvm] [MachineFrameInfo] Refactoring with computeMaxcallFrameSize() (NFC) (PR #78001)

[Jonas Paulsson via llvm-commits]

JonPsson1 wrote:

It needs to be done with an extra loop as targets may insert new call frame setup instructions during pseudo expansion. If this extra loop is not acceptable, maybe then give up here on setting AdjustsStack during/after isel.

https://github.com/llvm/llvm-project/pull/78001