The crypto engines found on the cp110 master and slave are dma coherent.
This patch adds the relevant property to their dt nodes.

Cc: stable@vger.kernel.org # v4.12+
Fixes: 973020fd ("arm64: marvell: dts: add crypto engine description for 7k/8k")
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>