vxge: NETIF_F_LLTX removal

NETIF_F_LLTX and it's usage of local transmit locks are depricated in
favor of using the netdev queue's transmit lock.  Remove the local
lock and all references to it, and use the netdev queue transmit lock
in the transmit completion handler.

Signed-off-by: Jon Mason <jon.mason@exar.com>
Signed-off-by: Ramkrishna Vepa <ramkrishna.vepa@exar.com>
Signed-off-by: David S. Miller <davem@davemloft.net>