[llvm] [NFC][AMDGPU] Apply clang-format on S/V_INDIRECT_REG_... lines in SIInstructions.td (PR #171833)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm requested changes to this pull request.

Disregard clang-format warnings on tablegen. I would say it's wrong 99% of the time 

https://github.com/llvm/llvm-project/pull/171833