The parameter extack was added to batadv_softif_slave_add without adding
the kernel-doc for it. This caused kernel-doc warnings.
Signed-off-by: NSven Eckelmann <sven@narfation.org>
Acked-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NSimon Wunderlich <sw@simonwunderlich.de>