Add initial support for Orangepi Zero3 board:
- U-Boot 2021.07 fork by Orangepi
- Linux 6.1.31 fork by Orangepi
- Default packages from buildroot
Enable CONFIG_MFD_AC200 as it is used directly by other module,
resulting in build failure when disabled.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Tested-by: Sergey Kuzminov <kuzminov.sergey81@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
