MIPS: lantiq: clear all irqs properly on boot

Due to missing brackets, the irq modules were not properly reset on boot.

Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3719/


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