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: Maciej Trela <maciej.trela@intel.com>
Reported-by: Richard Boyd <richard.g.boyd@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c
index 6ef4bd9..0a3aec1 100644
--- a/drivers/scsi/isci/port.c
+++ b/drivers/scsi/isci/port.c
@@ -1199,6 +1199,8 @@
 	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: {