[llvm] [RISCV] Consolidate some DecoderNamespaces for standard extensions. (PR #128954)

[Sam Elliott via llvm-commits]

lenary wrote:

> Can this patch go in as is and let the ordering issue be resolved separately?

Yes. Did you note my comment about the Zcmp/Zcmt typo?

https://github.com/llvm/llvm-project/pull/128954