[llvm] [AMDGPU] fix the check of inst-order in a test (PR #90744)

[Gang Chen via llvm-commits]

cmc-rep wrote:

> All these checks have been autogenerated (see comment line 1 of the test) so you really should not edit them by hand. If you do, your edits will get lost the next time some re-auto-generates the checks.

@jayfoad I didn't notice that. This is tricky. However, it feels like that there is no real good way to reduce merge difficulty in this case? I should close this PR?

https://github.com/llvm/llvm-project/pull/90744