rockchip: puma-rk3399: get closer to other Theobroma defconfigs

Disable support for unused OSes as Linux is the primary target.

Disable support for bootz as zImage isn't a format compatible with
Aarch64 machines so it should never be attempted to be booted.

Enable a bunch of commands:
 - erofs
 - gpio
 - squashfs

that could be useful and are also found in Jaguar and Tiger defconfigs.

Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>