pinctrl: sunxi: Move Allwinner A31 pinctrl driver to a driver of its own

Move the pin description to a driver specific to be. This is one more step
toward retiring pinctrl-sunxi-pins.h that used to define all the pins for all
the Allwinner SoCs in a single header, that would have in turn result in having
these structures in the final binary as many times as the header was included.
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

drivers/pinctrl/sunxi/Makefile

@@ -5,3 +5,4 @@ obj-$(CONFIG_PINCTRL_SUNXI)	+= pinctrl-sunxi.o
 obj-$(CONFIG_PINCTRL_SUNXI)	+= pinctrl-sun4i-a10.o
 obj-$(CONFIG_PINCTRL_SUNXI)	+= pinctrl-sun5i-a10s.o
 obj-$(CONFIG_PINCTRL_SUNXI)	+= pinctrl-sun5i-a13.o
+obj-$(CONFIG_PINCTRL_SUNXI)	+= pinctrl-sun6i-a31.o

drivers/pinctrl/sunxi/pinctrl-sunxi.c

@@ -674,7 +674,6 @@ static void sunxi_pinctrl_irq_handler(unsigned irq, struct irq_desc *desc)
 }
 
 static struct of_device_id sunxi_pinctrl_match[] = {
-	{ .compatible = "allwinner,sun6i-a31-pinctrl", .data = (void *)&sun6i_a31_pinctrl_data },
 	{ .compatible = "allwinner,sun6i-a31-r-pinctrl", .data = (void *)&sun6i_a31_r_pinctrl_data },
 	{ .compatible = "allwinner,sun7i-a20-pinctrl", .data = (void *)&sun7i_a20_pinctrl_data },
 	{}