Because this function will be no longer auxvec-only, this commit adds a comment to mark auxvec-based part. It *does not* add a comment to "base ISA" part because it may also use `riscv_hwprobe`-based results.
Because this function will be no longer auxvec-only, this commit adds a comment to mark auxvec-based part. It *does not* add a comment to "base ISA" part because it may also use `riscv_hwprobe`-based results.