MIPS: Octeon: Kill cvmx_helper_link_autoconf()

Kill cvmx_helper_link_autoconf(). Nobody uses this function.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14626/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>