rockchip: rk3036: Add scan fdt dev for syscon

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Change-Id: Ia7944d2f4da9ca39e57a1ba0e5116e7d2ac502c3

rockchip: rk3036: Add a simple syscon driver

Add a driver that provides access to system controllers

Signed-off-by: Lin Huang <hl@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>