Merge tag 'sunxi-pinctrl-for-3.16' of https://github.com/mripard/linux into devel

Merge tag 'sunxi-pinctrl-for-3.16' of https://github.com/mripard/linux into devel

Pinctrl cleanup and reworks for 3.16

This serie of patch:
  - Moves the Allwinner pinctrl driver to a folder of its own
  - removes the sunxi-pinctrl-pins header, and split the driver into a core
    one, with all the logic, and smaller drivers, one for each SoC, that
    declare the pins, and will provide to the core the set of pins.
  - And does a few cleanups here and there.