isci: clarify phy to port lookups

While cleaning up the driver it is very tempting to convert scic_sds_get_*
macros to their open coded equivalent.  They are all just pointer dereferences
*except* scic_sds_phy_get_port() which returns NULL if the phy is assigned to
the dummy port.  Clarify this by renaming it to phy_get_non_dummy_port().

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c
index 9a5ec37..8bd1a85 100644
--- a/drivers/scsi/isci/phy.c
+++ b/drivers/scsi/isci/phy.c
@@ -287,7 +287,7 @@
  * port (i.e. it's contained in the dummy port). !NULL All other
  * values indicate a handle/pointer to the port containing the phy.
  */
-struct scic_sds_port *scic_sds_phy_get_port(
+struct scic_sds_port *phy_get_non_dummy_port(
 	struct scic_sds_phy *sci_phy)
 {
 	if (scic_sds_port_get_index(sci_phy->owning_port) == SCIC_SDS_DUMMY_PORT)
@@ -893,7 +893,7 @@
 			break;
 		case SCU_EVENT_BROADCAST_CHANGE:
 			/* Broadcast change received. Notify the port. */
-			if (scic_sds_phy_get_port(sci_phy) != NULL)
+			if (phy_get_non_dummy_port(sci_phy) != NULL)
 				scic_sds_port_broadcast_change_received(sci_phy->owning_port, sci_phy);
 			else
 				sci_phy->bcn_received_while_port_unassigned = true;
@@ -1238,7 +1238,7 @@
 
 	if (sci_phy->state_machine.previous_state_id != SCI_BASE_PHY_STATE_INITIAL)
 		scic_sds_controller_link_down(scic_sds_phy_get_controller(sci_phy),
-					      scic_sds_phy_get_port(sci_phy),
+					      phy_get_non_dummy_port(sci_phy),
 					      sci_phy);
 }
 
@@ -1255,7 +1255,7 @@
 
 	if (sci_phy->state_machine.previous_state_id == SCI_BASE_PHY_STATE_READY)
 		scic_sds_controller_link_down(scic_sds_phy_get_controller(sci_phy),
-					      scic_sds_phy_get_port(sci_phy),
+					      phy_get_non_dummy_port(sci_phy),
 					      sci_phy);
 
 	sci_base_state_machine_change_state(&sci_phy->state_machine,
@@ -1267,7 +1267,7 @@
 	struct scic_sds_phy *sci_phy = object;
 
 	scic_sds_controller_link_up(scic_sds_phy_get_controller(sci_phy),
-				    scic_sds_phy_get_port(sci_phy),
+				    phy_get_non_dummy_port(sci_phy),
 				    sci_phy);
 
 }