arm64: marvell: dts: fix interrupts in 7k/8k crypto nodes

The cryptographic engine nodes have an interrupt which is configured as
both edge and level, which makes no sense at all. Fix this by
configuring it the right way (level).

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>