qed: Add dcbx app support for IEEE Selection Field.

MFW now supports the Selection field for IEEE mode. Add driver changes to
use the newer MFW masks to read/write the port-id value.

Signed-off-by: Sudarsana Reddy Kalluru <sudarsana.kalluru@qlogic.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>