pinctrl: core: Add missing EXPORT on pinctrl_register_mappings

Systems that don't have devicetree need pinctrl_register_mappings.
It should be EXPORT_SYMBOL_GPL so that it can be called from
pinctrl drivers built as modules.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/core.c

@@ -1416,6 +1416,7 @@ int pinctrl_register_mappings(const struct pinctrl_map *maps,
 {
 	return pinctrl_register_map(maps, num_maps, true);
 }
+EXPORT_SYMBOL_GPL(pinctrl_register_mappings);
 
 void pinctrl_unregister_map(const struct pinctrl_map *map)
 {