Merge branch 'next' of https://source.denx.de/u-boot/custodians/u-boot-marvell into next

- Armada XP etc: Move to DM_I2C (Stefan)
- Some mvebu comphy + mox + fdt_support changes (Marek & Pali)
- mvebu: a38x: improve USB3 serdes configuration (Stefan Eichenberger)
- mvebu: Some maintainer updates (Pali)
- mvebu: Misc minor cleanup (Pali)