pinctrl/nomadik: add STn8815 ASIC support

This adds support for the STN8815 ASIC for the Nomadik pin
controller.

Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/pinctrl-nomadik.h b/drivers/pinctrl/pinctrl-nomadik.h
index e88320f..5c99f1c 100644
--- a/drivers/pinctrl/pinctrl-nomadik.h
+++ b/drivers/pinctrl/pinctrl-nomadik.h
@@ -62,6 +62,19 @@
 	unsigned ngroups;
 };
 
+#ifdef CONFIG_PINCTRL_STN8815
+
+void nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc);
+
+#else
+
+static inline void
+nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc)
+{
+}
+
+#endif
+
 #ifdef CONFIG_PINCTRL_DB8500
 
 void nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc);