pinctrl: sunxi: Move the Allwinner pinctrl driver to its own directory

This will allow to create numerous files without crippling the main pinctrl
directory.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --cc drivers/pinctrl/Kconfig
Simple merge

diff --cc drivers/pinctrl/Makefile
Simple merge

diff --cc drivers/pinctrl/sunxi/Kconfig
Simple merge

diff --cc drivers/pinctrl/sunxi/Makefile
Simple merge

diff --cc drivers/pinctrl/sunxi/pinctrl-sunxi-pins.h
Simple merge

diff --cc drivers/pinctrl/sunxi/pinctrl-sunxi.c
Simple merge

diff --cc drivers/pinctrl/sunxi/pinctrl-sunxi.h
Simple merge