[SCSI] qla4xxx: Fix sparse warning for qla4xxx_sysfs_ddb_tgt_create

Fix following warning:
drivers/scsi/qla4xxx/ql4_os.c:5507:5:
warning: symbol 'qla4xxx_sysfs_ddb_tgt_create' was not declared. Should it be
static?
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/qla4xxx/ql4_os.c

@@ -5504,7 +5504,7 @@ static int qla4xxx_sysfs_ddb_is_non_persistent(struct device *dev, void *data)
  * If this is invoked as a result of a userspace call then the entry is marked
  * as nonpersistent using flash_state field.
  **/
-int qla4xxx_sysfs_ddb_tgt_create(struct scsi_qla_host *ha,
+static int qla4xxx_sysfs_ddb_tgt_create(struct scsi_qla_host *ha,
 					struct dev_db_entry *fw_ddb_entry,
 					uint16_t *idx, int user)
 {