Current code checks for NULL ndev twice where 2nd check is always
invalid given the fact that during route resolving stage, device address
must be bound to netdevice interface.

This patch simplifies such check.
Signed-off-by: NParav Pandit <parav@mellanox.com>
Reviewed-by: NDaniel Jurgens <danielj@mellanox.com>
Signed-off-by: NLeon Romanovsky <leon@kernel.org>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>