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

- Kirkwood: remove km/keymile kirkwood boards (Holger)
- mtd: nand: pxa3xx: simplify ECC hardware parameters (Chris)
- tools: kwbimage: Verify maximal kwbimage header size (Pali)
- mvebu: Add support for programming LD eFuse on Armada 385 (Pali)
- mvebu: Misc timer improvements / cleanup (Stefan)