dt-bindings: Add RK808 device tree bindings document

Add device tree bindings documentation and a header file
for rockchip's RK808 pmic.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Signed-off-by: Zhang Qing <zhangqing@rock-chips.com>

Tested-by: Heiko <heiko@sntech.de>
MFD: RK808: Add new mfd driver for RK808

The RK808 chip is a power management IC for multimedia and handheld
devices. It contains the following components:

- Regulators
- RTC
- Clkout

The RK808 core driver is registered as a platform driver and provides
communication through I2C with the host device for the different
components.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Signed-off-by: Zhang Qing <zhangqing@rock-chips.com>

Acked-by: Lee Jones <lee.jones@linaro.org>
Tested-by: Heiko <heiko@sntech.de>
regulator: rk808: Fix n_voltages for DCDC4

The min_sel is 0, max_sel is 15, so n_voltages should be 16.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
regulator: RK808: Add proper input supplies for rk808

The original RK808 regulator driver didn't setup input supplies
properly.  Add them.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>