qede: Free netdevice only after stoping slowpath

qede: Free netdevice only after stoping slowpath

Orabug: 25477939

qed needs to be informed of the removal of the qede interface
prior to its actual removal, as qede has some registered callbacks
that might get called async to the removal flow.

Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 885185dfc49bde35b45046bb6b7384eca68e404f)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
	drivers/net/ethernet/qlogic/qede/qede_main.c