[clang] [llvm] [RISCV] Add processor definition for XiangShan-KunMingHu (PR #89359)

[Pengcheng Wang via cfe-commits]

wangpc-pp wrote:

Has KunMingHu's RTl been finalized (IIRC, we have developing vector unit)? And can we have different doc for different generations of XiangShan?

https://github.com/llvm/llvm-project/pull/89359