[TableGen] Simplify insertBits (NFC)#137538

kazutakahirata merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

kazutakahirata:cleanup_001_constexpr_if_llvm_insertBitskazutakahirata/llvm-project:cleanup_001_constexpr_if_llvm_insertBitsCopy head branch name to clipboard