[RISCV][VLOPT] Add vfsqrt/vfrsqrt7 instruction to isSupportInstr#127462

LiqinWeng merged 3 commits intollvm:mainllvm/llvm-project:mainfrom

LiqinWeng:supoort-fsqrtLiqinWeng/llvm-project:supoort-fsqrtCopy head branch name to clipboard