usbnet: cleanup after bind() in probe()

usbnet: cleanup after bind() in probe()

Orabug: 25308048

[ Upstream commit 1666984c8625b3db19a9abc298931d35ab7bc64b ]

In case bind() works, but a later error forces bailing
in probe() in error cases work and a timer may be scheduled.
They must be killed. This fixes an error case related to
the double free reported in
http://www.spinics.net/lists/netdev/msg367669.html
and needs to go on top of Linus' fix to cdc-ncm.

Signed-off-by: Oliver Neukum <ONeukum@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
(cherry picked from commit 900aa9788446a8bc7fc40f21199bbe1dbdc1bf19)
Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>