[clang] [llvm] [RISCV] Remove B and Zbc extension from Andes series cpus. (PR #144022)

[Aaron Ballman via llvm-commits]

AaronBallman wrote:

This has been failing post-commit CI for two days, so I've put up a patch to revert the changes: https://github.com/llvm/llvm-project/pull/144402

https://github.com/llvm/llvm-project/pull/144022