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/f_sourcesink.c b/drivers/usb/gadget/f_sourcesink.c
index 6d3cc44..685d768 100644
--- a/drivers/usb/gadget/f_sourcesink.c
+++ b/drivers/usb/gadget/f_sourcesink.c
@@ -404,7 +404,7 @@
 
 /*-------------------------------------------------------------------------*/
 
-static int __init sourcesink_bind_config(struct usb_configuration *c)
+static int __ref sourcesink_bind_config(struct usb_configuration *c)
 {
 	struct f_sourcesink	*ss;
 	int			status;