arm64: dts: marvell: add DTS for GL.iNet GL-MV1000

The GL-MV1000 (Brume) is a small form-factor gateway router.
It is based on the Marvell Armada 88F3720 SOC (1GHz), has 3 gigabit ethernet ports, 1 GB RAM, 16M SPI flash, 8GB eMMC and an uSD slot, as well as an USB 2.0 type A and an USB 3.0 type C port.

Signed-off-by: Enrico Mioso <mrkiko.rs@gmail.com>
CC: Pali <pali@kernel.org>
Reviewed-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>