[llvm] [RISCV][MC] MC layer support for the experimental zalasr extension (PR #69685)

[Brendan Sweeney via llvm-commits]

mehnadnerd wrote:

> Zalasr is using the namespace reserved for standard extensions, but doesn't seem to be being developed under github.com/riscv - why is that? Is the repo going to get moved to that org? I see it _is_ an official in-development extension based on your riscv-opcodes PR, but it would be great to remove that ambiguity.
I'm honestly not entirely sure--I think it will be moved into there eventually, but I am unsure of the process.


https://github.com/llvm/llvm-project/pull/69685