cxgb4: print port information after registering each netdev

Print information about each port when its netdev is registered instead
of looping separately over the ports at the end.  The bulk of this patch
is due to indentation change.

Signed-off-by: Dimitris Michailidis <dm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>