usb: cdns3: Add static to cdns3_gadget_exit function

Function cdns3_gadget_exit is used only in gadget.c file.
This patch removes declaration and definition of this
function from gadget-export.h file and makes it static.
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>

drivers/usb/cdns3/gadget-export.h

@@ -13,7 +13,6 @@
 #ifdef CONFIG_USB_CDNS3_GADGET
 
 int cdns3_gadget_init(struct cdns3 *cdns);
-void cdns3_gadget_exit(struct cdns3 *cdns);
 #else
 
 static inline int cdns3_gadget_init(struct cdns3 *cdns)
@@ -21,8 +20,6 @@ static inline int cdns3_gadget_init(struct cdns3 *cdns)
 	return -ENXIO;
 }
 
-static inline void cdns3_gadget_exit(struct cdns3 *cdns) { }
-
 #endif
 
 #endif /* __LINUX_CDNS3_GADGET_EXPORT */

drivers/usb/cdns3/gadget.c

@@ -3083,7 +3083,7 @@ static void cdns3_gadget_release(struct device *dev)
 	kfree(priv_dev);
 }
 
-void cdns3_gadget_exit(struct cdns3 *cdns)
+static void cdns3_gadget_exit(struct cdns3 *cdns)
 {
 	struct cdns3_device *priv_dev;