[llvm] [AMDGPU] Still set up the two SGPRs for queue ptr even it is COV5 (PR #112403)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> https://lab.llvm.org/buildbot/#/builders/123/builds/9031

That's one of the flaky tests that randomly fails 

https://github.com/llvm/llvm-project/pull/112403