ARM: rockchip: remove obsolete rockchip,config properties

These were used only in one variant of the pinctrl driver but
forgotten in the dtsi file. rockchip,config nodes are neither
part of the actual binding nor handled by the pinctrl driver
at all, so remove them.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
remove obsolete rockchip,config from rk3188.dtsi
sanitize pull basics for rk3188