[llvm] [RISCV] add computeKnownBitsForTargetNode for RISCVISD::SRLW (PR #155995)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

> > @bojle From the buildbot failures it looks like there's a missing lib dependency
> 
> Does [5cf1245](https://github.com/llvm/llvm-project/commit/5cf12458433a74859a5d90c8e5163ba1b2b717f5) fix it?

Yes - I think so - cheers @kparzysz


https://github.com/llvm/llvm-project/pull/155995