Merge https://gitlab.denx.de/u-boot/custodians/u-boot-marvell

- mvebu: a38x: Define supported UART baudrates (Pali)
- kwbimage: Misc improvements (Pali)
- espressobin/turris_mox/turris_omnia: Enable some more devices
  like SATA via PCIe, SATA & NVMe (Pali)
- a37xx: Remove unused CONFIG_DEBUG_UART_SHIFT options (Pali)
- turris_omnia: Disable MCU watchdog in SPL when booting over
  UART (Marek)
- kwbimage: Fix some Coverity issue (Heinrich)