[llvm] [RISCV] Run EarlyMachineLICM before VLOptimizer to hoist constant splats (PR #210028)

[Luke Lau via llvm-commits]

lukel97 wrote:

It looks like we failed to hoist it even before https://github.com/llvm/llvm-project/pull/179377. Not quite sure why

https://github.com/llvm/llvm-project/pull/210028