pinctrl: Add Apple pinctrl driver

This driver supports both pin muxing and GPIO support for the
pin control logic found on Apple SoCs.

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 05b71f2..fd736a7 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -3,6 +3,7 @@
 obj-y					+= pinctrl-uclass.o
 obj-$(CONFIG_$(SPL_)PINCTRL_GENERIC)	+= pinctrl-generic.o
 
+obj-$(CONFIG_PINCTRL_APPLE)		+= pinctrl-apple.o
 obj-$(CONFIG_PINCTRL_AT91)		+= pinctrl-at91.o
 obj-$(CONFIG_PINCTRL_AT91PIO4)		+= pinctrl-at91-pio4.o
 obj-y					+= nxp/