rockchip: rk3288-miqi: Migrate to OF_UPSTREAM

The device tree for mqmaker MiQi in dts/upstream can be used as-is by
U-Boot, migrate board to OF_UPSTREAM.

The change to use DT from dts/upstream will include minor changes and
fixes related to work led and usb otg.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
5 files changed