Update the U-Boot to version v2021.01.
Run-tested: FriendlyARM NanoPi R2S
Radxa Rock Pi 4
Pine64 RockPro64
Signed-off-by: Marty Jones <mj8263788@gmail.com>
[format commit message]
Signed-off-by: David Bauer <mail@david-bauer.net>
Signed-off-by: CN_SZTL <cnsztl@project-openwrt.eu.org>