[llvm] [RISCV][MC] Support imm symbol in parseCSRSystemRegister (PR #112007)

[Mark Zhuang via llvm-commits]

zqb-all wrote:

> This looks good to me. Since this uses some of my code could you please add `Co-authored-by: Alex Richardson <alexrichardson at google.com>` to the commit message.

Oh, of course. Sorry I didn't add it before, it's now added, thanks again for the code and review.

https://github.com/llvm/llvm-project/pull/112007