scsi: aha1542: 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/20230322195515.1267197-20-bvanassche@acm.orgSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/aha1542.c

@@ -737,7 +737,8 @@ static void aha1542_set_bus_times(struct Scsi_Host *sh, int bus_on, int bus_off,
 }
 
 /* return non-zero on detection */
-static struct Scsi_Host *aha1542_hw_init(struct scsi_host_template *tpnt, struct device *pdev, int indx)
+static struct Scsi_Host *aha1542_hw_init(const struct scsi_host_template *tpnt,
+					 struct device *pdev, int indx)
 {
 	unsigned int base_io = io[indx];
 	struct Scsi_Host *sh;
@@ -1031,7 +1032,7 @@ static int aha1542_exit_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
 	return 0;
 }
 
-static struct scsi_host_template driver_template = {
+static const struct scsi_host_template driver_template = {
 	.module			= THIS_MODULE,
 	.proc_name		= "aha1542",
 	.name			= "Adaptec 1542",