scsi: target: tcm-loop: 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/20230322195515.1267197-79-bvanassche@acm.orgSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/target/loopback/tcm_loop.c

@@ -298,7 +298,7 @@ static int tcm_loop_target_reset(struct scsi_cmnd *sc)
 	return FAILED;
 }
 
-static struct scsi_host_template tcm_loop_driver_template = {
+static const struct scsi_host_template tcm_loop_driver_template = {
 	.show_info		= tcm_loop_show_info,
 	.proc_name		= "tcm_loopback",
 	.name			= "TCM_Loopback",