arm64: dts: marvell: Prepare the introduction of AP807 based SoCs

Prepare the support for Marvell AP807 die. This die is very similar to
AP806 but uses different DDR PHY. AP807 is a major component of CN9130
SoC series.
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>