MIPS: lantiq: cleanup reset code

Add 2 new soc specifc handlers and remove superflous pr_notice calls.

Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3705/


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