[compiler-rt] [llvm] [RISCV] Allocate Feature Bits for Zilsd/Zclsd/Zcmp (PR #135197)

[Sam Elliott via llvm-commits]

lenary wrote:

I don't think we need to wait for a "real" implementation in compiler-rt, because we don't expect linux HW_CAPS to come for these extensions for quite some time. The question remains as to whether anything else is needed for this change, maybe a test? I'm not sure.

https://github.com/llvm/llvm-project/pull/135197