arm64: dts: marvell: fix compatible string list for Armada CP110 slave NAND

The Armada CP110 slave NAND controller Device Tree description lists
the compatible string in the wrong order: marvell,armada-8k-nand
should come first. This commit alignes the slave CP110 description
with the master CP110 description from that respect.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>