bna: Delete get_flags and set_flags ethtool methods.

This driver doesn't support LRO, NTUPLE, or the RXHASH
features.  So it should not set these ethtool operations.

This also fixes the warning:

drivers/net/bna/bnad_ethtool.c:1272: warning: initialization from incompatible pointer type
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bna/bnad_ethtool.c

@@ -1268,8 +1268,6 @@ static struct ethtool_ops bnad_ethtool_ops = {
 	.set_sg = ethtool_op_set_sg,
 	.get_tso = ethtool_op_get_tso,
 	.set_tso = bnad_set_tso,
-	.get_flags = ethtool_op_get_flags,
-	.set_flags = ethtool_op_set_flags,
 	.get_strings = bnad_get_strings,
 	.get_ethtool_stats = bnad_get_ethtool_stats,
 	.get_sset_count = bnad_get_sset_count