usb: f_dfu: cosmetic: Code cleanup

Code cleanup for dfu_bind_config function

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
diff --git a/drivers/usb/gadget/f_dfu.c b/drivers/usb/gadget/f_dfu.c
index b4b4aa4..a045864 100644
--- a/drivers/usb/gadget/f_dfu.c
+++ b/drivers/usb/gadget/f_dfu.c
@@ -755,8 +755,8 @@
 	f_dfu->usb_function.unbind = dfu_unbind;
 	f_dfu->usb_function.set_alt = dfu_set_alt;
 	f_dfu->usb_function.disable = dfu_disable;
-	f_dfu->usb_function.strings = dfu_generic_strings,
-	f_dfu->usb_function.setup = dfu_handle,
+	f_dfu->usb_function.strings = dfu_generic_strings;
+	f_dfu->usb_function.setup = dfu_handle;
 	f_dfu->poll_timeout = DFU_DEFAULT_POLL_TIMEOUT;
 
 	status = usb_add_function(c, &f_dfu->usb_function);