[llvm] [Thumb1] LivePhysRegs to LiveRegUnits (PR #84474)

[via llvm-commits]

AtariDreams wrote:

> Please fix the commit message (which is taken from the first comment in the thread when I hit "squash and merge").
> 
> Also, your email address is currently hidden (see https://discourse.llvm.org/t/hidden-emails-on-github-should-we-do-something-about-it/74223/)

Done!

https://github.com/llvm/llvm-project/pull/84474