[S390] sclp: improve servicability setting

Set dump indicator on read-scp-info command to get meaningful dumps.
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/char/sclp_cmd.c

@@ -84,6 +84,7 @@ static void __init sclp_read_info_early(void)
 		do {
 			memset(sccb, 0, sizeof(*sccb));
 			sccb->header.length = sizeof(*sccb);
+			sccb->header.function_code = 0x80;
 			sccb->header.control_mask[2] = 0x80;
 			rc = sclp_cmd_sync_early(commands[i], sccb);
 		} while (rc == -EBUSY);