[llvm] [RISCV] Reverse the order of Base and Offset in Core-V RegReg operand. (PR #133209)

[Pengcheng Wang via llvm-commits]

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

LGTM! I didn't know we have the weird order until this patch. 

https://github.com/llvm/llvm-project/pull/133209