MIPS: octeon: remove typedef declaration for cvmx_helper_link_info

Remove declaration of union cvmx_helper_link_info as typedef and update
uses to use the union.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20200205001116.14096-5-chris.packham@alliedtelesis.co.nz


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