[llvm] [RISCV] Reorder RISCVInstrInfoA.td NFC (PR #77539)

[Wang Pengcheng via llvm-commits]

https://github.com/wangpc-pp approved this pull request.

LGTM.
https://github.com/llvm/llvm-project/pull/77424 should benefit from this change as I am really confused on the category these instructions locate in.

https://github.com/llvm/llvm-project/pull/77539