net: qlcnic: convert to hw_features

Bit more than minimal conversion. There might be some issues because
of qlcnic_set_netdev_features() if it's called after netdev init.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>