qeth: get rid of redundant 0-termination

0-termination is redundant, since sprintf has done that.
Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: NUrsula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/s390/net/qeth_core_main.c

@@ -2684,8 +2684,6 @@ void qeth_print_status_message(struct qeth_card *card)
 			sprintf(card->info.mcl_level, "%02x%02x",
 				card->info.mcl_level[2],
 				card->info.mcl_level[3]);
-
-			card->info.mcl_level[QETH_MCL_LENGTH] = 0;
 			break;
 		}
 		/* fallthrough */