hpsa: change devtype to unsigned

This member is used in calls to scsi_device_type.
It should be unsigned since the kernel checks for upper bounds
and it should never be negative.
Suggested-by: Tomas Henzl <thenzl@redhat.com>
Suggested-by: Hannes Reinecke <hare@suse.de>
Suggested-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/hpsa.h

@@ -34,7 +34,7 @@ struct access_method {
 };
 
 struct hpsa_scsi_dev_t {
-	int devtype;
+	unsigned int devtype;
 	int bus, target, lun;		/* as presented to the OS */
 	unsigned char scsi3addr[8];	/* as presented to the HW */
 #define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0"