MIPS: Add default configuration for ath25

Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/13700/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
1 file changed