[clang] [llvm] [RISCV] Add Smdbltrp and Ssdbltrp extension (PR #111837)

[Yingwei Zheng via cfe-commits]

https://github.com/dtcxzyw commented:

Personally I don't like to add a privileged extension if it doesn't introduce new CSRs/instructions.


https://github.com/llvm/llvm-project/pull/111837