Calling netdev_reset_queue() from _stop() functions is causing sporadic kernel
panics on bcm63xx, which happen mainly on BCM6318 and BCM6328.
This reverts to the previous behaviour, which called netdev_reset_queue() from
_open() functions.
Tested on Comtrend AR-5315u (BCM6318).
Fixes: 1d6f422e34 ("bcm63xx: sync ethernet driver with net-next")
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
