arm64: dts: marvell: enable several CP interfaces on Armada 7040-DB

This commit enables several interfaces of the CP side of the Armada
7040 for the Armada 7040 DB board:

 - one PCIe interface
 - one SPI controller with an attached SPI flash
 - one I2C controller
 - one SATA controller
 - two USB3 controllers

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