[llvm] [MIPS] Fix wrong errors being emitted when rejecting certain assembly… (PR #94695)

[Brad Smith via llvm-commits]

brad0 wrote:

@jdeguire The two people I tagged have been working on MIPS as of lately so tagging so they're aware.

I don't think with how it was tagged it'll get attention with that alone.

@yingopq @wzssyqa 

https://github.com/llvm/llvm-project/pull/94695