scsi: smartpqi: Replace one-element array with flexible-array member

One-element arrays are deprecated, and we are replacing them with flexible
array members instead. So, replace one-element array with flexible-array
member in struct report_log_lun_list.

This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines
on memcpy().

Link: https://lore.kernel.org/r/Y+LJz/r6+UeLqnV3@work
Link: https://github.com/KSPP/linux/issues/79
Link: https://github.com/KSPP/linux/issues/204
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Acked-by: Don Brace <don.brace@microchip.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/smartpqi/smartpqi.h

@@ -954,7 +954,7 @@ struct report_log_lun {
 
 struct report_log_lun_list {
 	struct report_lun_header header;
-	struct report_log_lun lun_entries[1];
+	struct report_log_lun lun_entries[];
 };
 
 struct report_phys_lun_8byte_wwid {

drivers/scsi/smartpqi/smartpqi_init.c

@@ -1259,7 +1259,8 @@ static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
 			"report logical LUNs failed\n");
 
 	/*
-	 * Tack the controller itself onto the end of the logical device list.
+	 * Tack the controller itself onto the end of the logical device list
+	 * by adding a list entry that is all zeros.
 	 */
 
 	logdev_data = *logdev_list;