isci: enable BCN in sci_port_add_phy()

Ensure we enable receiving BCN's from the
hardware when adding phy to isci_port.
Otherwise if we get BCN before the port is
created we won't see any BCN
Signed-off-by: NMaciej Trela <maciej.trela@intel.com>
Reported-by: NRichard Boyd <richard.g.boyd@intel.com>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>

drivers/scsi/isci/port.c

@@ -1199,6 +1199,8 @@ enum sci_status sci_port_add_phy(struct isci_port *iport,
 	enum sci_status status;
 	enum sci_port_states state;
 
+	sci_port_bcn_enable(iport);
+
 	state = iport->sm.current_state_id;
 	switch (state) {
 	case SCI_PORT_STOPPED: {