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

[Jesse D via llvm-commits]

jdeguire wrote:

Ping!

Apologies for the late check-in. Does my explanation of what the change is doing help? I could try adding a comment to the code if that would be better.

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