pinctrl: move the U300 GPIO driver to pinctrl

This driver will be converted to a dual GPIO + pinctrl driver
since it supports biasing and driving control options. Hopefully
it can serve as an example.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 50a2e2f..5f3e4d6 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -6,3 +6,4 @@
 obj-$(CONFIG_PINMUX)		+= pinmux.o
 obj-$(CONFIG_PINMUX_SIRF)	+= pinmux-sirf.o
 obj-$(CONFIG_PINMUX_U300)	+= pinmux-u300.o
+obj-$(CONFIG_PINCTRL_COH901)	+= pinctrl-coh901.o