scsi: atp870u: 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/20230322195515.1267197-30-bvanassche@acm.orgSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/atp870u.c

@@ -40,7 +40,7 @@
 
 #include "atp870u.h"
 
-static struct scsi_host_template atp870u_template;
+static const struct scsi_host_template atp870u_template;
 static void send_s870(struct atp_unit *dev,unsigned char c);
 static void atp_is(struct atp_unit *dev, unsigned char c, bool wide_chip,
 		   unsigned char lvdmode);
@@ -1726,7 +1726,7 @@ static void atp870u_remove (struct pci_dev *pdev)
 }
 MODULE_LICENSE("GPL");
 
-static struct scsi_host_template atp870u_template = {
+static const struct scsi_host_template atp870u_template = {
      .module			= THIS_MODULE,
      .name			= "atp870u"		/* name */,
      .proc_name			= "atp870u",