Merge tag 'uniphier-v2020.07' of https://gitlab.denx.de/u-boot/custodians/u-boot-uniphier

UniPhier SoC updates for v2020.07

 - De-assert write protect for Denali NAND driver

 - Clean up include directives

 - Migrate to DM_ETH, and remove legacy board_eth_init()