sh: pfc: Export pinctrl binding init symbol.

symbol_request() requires the registration symbol to be exported, make
sure it is.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

drivers/sh/pfc/pinctrl.c

@@ -283,6 +283,7 @@ int sh_pfc_register_pinctrl(struct sh_pfc *pfc)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(sh_pfc_register_pinctrl);
 
 static inline void __devinit sh_pfc_map_one_gpio(struct sh_pfc *pfc,
 						 struct sh_pfc_pinctrl *pmx,