staging: octeon: Indent with tabs instead of spaces

Remove a coding style error. It makes code more readable.

Signed-off-by: Muhammad Usama Anjum <musamaanjum@gmail.com>
Link: https://lore.kernel.org/r/20200723132123.GA26221@musamaanjum


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>