The assignement of skb->dev is done all over the place. So it makes it
hard to eventually get rid of it. Move it all in one central place so
it gets assigned right before calling hdev->send driver callback.
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>