scsi: ppa: Declare SCSI host template const

Make it explicit that the SCSI host template is not modified.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230322195515.1267197-65-bvanassche@acm.orgSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ppa.c

@@ -972,7 +972,7 @@ static int ppa_adjust_queue(struct scsi_device *device)
 	return 0;
 }
 
-static struct scsi_host_template ppa_template = {
+static const struct scsi_host_template ppa_template = {
 	.module			= THIS_MODULE,
 	.proc_name		= "ppa",
 	.show_info		= ppa_show_info,