MIPS: lantiq: move eiu init after irq_domain register

The eiu init failed as the irq_domain was not yet available.

Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/8047/


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