[CostModel/RISCV] Fix costs of [l]lrint, [l]lround#145714

artagnon wants to merge 2 commits intollvm:mainllvm/llvm-project:mainfrom

artagnon:cm-riscv-lrint-lroundartagnon/llvm-project:cm-riscv-lrint-lroundCopy head branch name to clipboard