pinctrl: rockchip: Add iomux-route switching support for rk3288

[David.Wu]

Hi Heiko,

在 2017/10/21 16:53, Heiko Stuebner 写道:
> The rk3288 also has one function that can be routed to one of two pins,
> the hdmi cec functionality can use either gpio7c0 or gpio7c7.
> So add the route switching support for it.
> 
> Signed-off-by: Heiko Stuebner <heiko at sntech.de>
> Tested-by: Hans Verkuil <hans.verkuil at cisco.com>

Reviewed-by: David Wu <david.wu at rock-chips.com>
Thanks.