appletalk: factor out a atrtr_ioctl_addrt helper

Add a helper than can be shared with the upcoming compat ioctl handler.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig 2020-05-18 08:28:07 +02:00 • committed by David S. Miller
commit a500492354