scsi: hpsa: Increase queue depth for external LUNs

Increase queue_depth for PTRAID devices to improve performance.

Link: https://lore.kernel.org/r/159528197765.24772.15623281371636788406.stgit@brunhildaReviewed-by: Scott Teel <scott.teel@microsemi.com>
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/hpsa.h

@@ -57,7 +57,7 @@ struct hpsa_sas_phy {
 	bool added_to_port;
 };
 
-#define EXTERNAL_QD 7
+#define EXTERNAL_QD 128
 struct hpsa_scsi_dev_t {
 	unsigned int devtype;
 	int bus, target, lun;		/* as presented to the OS */