[llvm] [LoongArch] Emit error messages when using emulated TLS (PR #92483)

[via llvm-commits]

wangleiat wrote:

> Instead of an error for each TLS instance, emit it in TargetMachine ?

I didn't find a way to emit an error message and return the error to the error handler. Either use `report_fatal_error` ?

https://github.com/llvm/llvm-project/pull/92483