[llvm] [AVR] Force relocations for non-encodable jumps (PR #121498)

[Phoebe Wang via llvm-commits]

phoebewang wrote:

> > Thanks! Could you backport it, @benshi001? (pinging llvm-bot should do, it's just that I don't have permissions for that)
> 
> I think you have satisfied the threshold to apply for some permissions, please send an email to Chris Lattner.

Kind reminder: we are using PR for permissions now [#obtaining-commit-access](https://llvm.org/docs/DeveloperPolicy.html#obtaining-commit-access)

https://github.com/llvm/llvm-project/pull/121498