usb: gadget: f_obex: fix error return code in obex_bind()

Fix to return a negative error code from the error handling
case instead of 0, as returned elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/f_obex.c b/drivers/usb/gadget/f_obex.c
index 29a348a..8aa2be5 100644
--- a/drivers/usb/gadget/f_obex.c
+++ b/drivers/usb/gadget/f_obex.c
@@ -348,6 +348,7 @@
 
 	/* allocate instance-specific endpoints */
 
+	status = -ENODEV;
 	ep = usb_ep_autoconfig(cdev->gadget, &obex_fs_ep_in_desc);
 	if (!ep)
 		goto fail;