[llvm] [Sparc] Handle two new cases in the GRLIB-TN-0010 workaround pass (PR #205780)

[via llvm-commits]

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koachan wrote:

And here too, because if I go by [the document](https://download.gaisler.com/technical_notes/GRLIB-TN-0010.pdf), LDSTUB seems to be affected too?

https://github.com/llvm/llvm-project/pull/205780