[clang] [llvm] Revert "[RISCV] Remove B and Zbc extension from Andes series cpus." (PR #144402)

[Craig Topper via llvm-commits]

topperc wrote:

> Since https://github.com/llvm/llvm-project/pull/144848 has landed, I reverted this reverted commit by https://github.com/llvm/llvm-project/commit/f78819aeef32e50ac3fec9a175b70a971b7c10e5.

In the future use "Recommit" in the title instead of "Revert Revert".

https://github.com/llvm/llvm-project/pull/144402