MIPS: lantiq: Refresh default configuration

Just generate a configuration based on this default configuration and
store it again. This removed some old configuration options.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: John Crispin <john@phrozen.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14629/


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