rockchip: use OF_UPSTREAM for rk3066a/rk3188

The device tree for rk3066a/rk3188 combined is now
available in the /dts/upstream directory.
Use imply OF_UPSTREAM to migrate all rk3066a/rk3188 boards.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
11 files changed