isci: kill sci_phy_protocol and sci_request_protocol

Holdovers from the initial driver cleanup, replace with enum sas_protocol.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/include/scsi/sas.h b/include/scsi/sas.h
index a577a83..be3eb0b 100644
--- a/include/scsi/sas.h
+++ b/include/scsi/sas.h
@@ -103,6 +103,7 @@
 };
 
 enum sas_protocol {
+	SAS_PROTOCOL_NONE		= 0,
 	SAS_PROTOCOL_SATA		= 0x01,
 	SAS_PROTOCOL_SMP		= 0x02,
 	SAS_PROTOCOL_STP		= 0x04,