s390: avoid format strings leaking into names

This makes sure format strings can't accidentally leak into kernel
interface names.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --cc drivers/s390/block/dcssblk.c
Simple merge

diff --cc drivers/s390/char/vmlogrdr.c
Simple merge

diff --cc drivers/s390/crypto/zcrypt_api.c
Simple merge