The CPU identifiers for cn68XX, cn66XX and cn61XX are known, so add
them.
Signed-off-by: NDavid Daney <david.daney@cavium.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2776/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>