MIPS: OCTEON: disable HOTPLUG_CPU if the bootloader version is incorrect

Disable HOTPLUG_CPU functionality if the bootloader version is incorrect.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: linux-mips@linux-mips.org
Cc: David Daney <ddaney.cavm@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/7200/


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