Initial support for the Ubiquiti Networks XM board (rev 1.0).

Signed-off-by: Rene Bolldorf <xsecute@googlemail.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/3020/


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