MIPS: Lemote 2F: Add Lynloong support

Add a new machtype and kernel options for the Lynloong.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/657/


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