[llvm] [MachineScheduler] Improve handling of phys regs in GenericScheduler() (NFC). (PR #187572)

[Jonas Paulsson via llvm-commits]

JonPsson1 wrote:

> I think that's fine. Other flags like OnlyTopDown might already do that (i.e. setting to the same value) anyway.

ok, that's a good point. Patch updated accordingly.

https://github.com/llvm/llvm-project/pull/187572