UPSTREAM: usbnet: cleanup after bind() in probe()

Bug: 28744625

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.

(cherry picked from commit 1666984c8625b3db19a9abc298931d35ab7bc64b)

Change-Id: I7e13c0a48b4b85ff5cbea37252e52750d9471ecd
Signed-off-by: Oliver Neukum <ONeukum@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Yueyao (Nathan) Zhu <yueyao@google.com>