USB: gadget: section mismatch warning fixed

In may gadgets bind and bind like functions were in a init section
as they were only run during initialisation.  However, being
callback functions they were referenced from structures in “normal”
sections.  Changing the tag from “__init” to “__ref” fixes the
warnings.

Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/gadget/gmidi.c b/drivers/usb/gadget/gmidi.c
index b7bf880..1b413a5 100644
--- a/drivers/usb/gadget/gmidi.c
+++ b/drivers/usb/gadget/gmidi.c
@@ -1157,7 +1157,7 @@
 /*
  * Creates an output endpoint, and initializes output ports.
  */
-static int __init gmidi_bind(struct usb_gadget *gadget)
+static int __ref gmidi_bind(struct usb_gadget *gadget)
 {
 	struct gmidi_device *dev;
 	struct usb_ep *in_ep, *out_ep;