[PATCH v5 4/4] riscv/barrier: Resolve checkpatch.pl error

[Eric Chan]

Hi Andrea,

Thank you very much for patiently reviewing and pointing out areas for improvement.
I also appreciate your kindness.
This is actually my second time submitting an upstream patch,
and the first time submitting multiple patches.
There are still many shortcomings, even though I carefully read the documentation
and refer other submissions before submitting my changes.

Once again, thank you for reviewing and providing such friendly suggestions.

Sincerely,
  Eric Chan