greybus: drop a redundant assignment

Get rid of a duplicate assignment of an interface's device id.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/staging/greybus/module.c

@@ -168,7 +168,6 @@ gb_module_interface_init(struct gb_module *gmod, u8 interface_id, u8 device_id)
 		/* XXX clear route */
 		return ret;
 	}
-	interface->device_id = device_id;
 
 	return 0;
 }