[llvm-branch-commits] [Sparc] Fix instr desc of special register stores (PR #88971)

[via llvm-branch-commits]

darkbuck wrote:

I separated this change from the original one https://github.com/llvm/llvm-project/pull/88837 so that that tablegen change is clean.

https://github.com/llvm/llvm-project/pull/88971