Add support for IRQ handling on a JZ4740 SoC.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1465/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>