Add default config for Loongson-2K1000.
Signed-off-by: NJiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: NQing Zhang <zhangqing@loongson.cn>
Tested-by: NMing Wang <wangming01@loongson.cn>
Signed-off-by: NThomas Bogendoerfer <tsbogend@alpha.franken.de>