cxgb3: fix crash due to manipulating queues before registration

Along the same lines as "cxgb4: fix crash due to manipulating queues
before registration" (8f6d9f40476895571df039b6f1f5230ec7faebad), before
commit "net: allocate tx queues in register_netdevice"
netif_tx_stop_all_queues and related functions could be used between
device allocation and registration but now only after registration.
cxgb4 has such a call before registration and crashes now. Move it
after register_netdev.

Signed-off-by: Nishanth Aravamudan <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: Divy Le Ray <[e-mail]>
Cc: Dimitris Michailidis <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Tested-by: Nishanth Aravamudan <[e-mail]>
Acked-by: Divy Le Ray <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/cxgb3/cxgb3_main.c

···
 		pi->rx_offload = T3_RX_CSUM | T3_LRO;
 		pi->port_id = i;
 		netif_carrier_off(netdev);
-		netif_tx_stop_all_queues(netdev);
 		netdev->irq = pdev->irq;
 		netdev->mem_start = mmio_start;
 		netdev->mem_end = mmio_start + mmio_len - 1;
···
 				adapter->name = adapter->port[i]->name;
 
 			__set_bit(i, &adapter->registered_device_map);
+			netif_tx_stop_all_queues(adapter->port[i]);
 		}
 	}
 	if (!adapter->registered_device_map) {