io-voltage control is actually part of the grf, so move the node under the
newly available grf simple-mfd.
To minimize duplicate code, the core node and compatible property
gets placed in the core rk3288.dtsi while the individual boards
now only need to enable it and add the necessary supply properties.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
The MiQi is a rk3288-based devboard from Shenzen based mqmaker, with a
footprint the size of a credit card.
Main available outside connections are 4 usb ports, hdmi, gigabit
ethernet and two expansion headers.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
