[llvm] [RISCV] Allow crypto features to imply dependents (PR #112659)

[via llvm-commits]

workingjubilee wrote:

This was brought to attention by https://github.com/rust-lang/rust/issues/131800

One could make some argument this is the job of the frontend, I think, and instead the frontend should _satisfy_ this dependency! ...but it would still be preferable to encode this relationship in the `.td`, so the dependency check can be generated.

https://github.com/llvm/llvm-project/pull/112659