ARM: shmobile: emev2: Setup internal peripheral interrupts as level high

Interrupts generated by SoC internal devices are currently marked as
IRQ_TYPE_NONE. As they're level-triggered and active-high, mark them as
such.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>