s390/crypto: Don't panic after crypto instruction failures

commit 36eb2caa7bace31b7868a57f77cb148e58d1c9f9 upstream.

Remove the BUG_ON's that check for failure or incomplete
results of the s390 hardware crypto instructions.
Rather report the errors as -EIO to the crypto layer.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --cc arch/s390/crypto/aes_s390.c
Simple merge

diff --cc arch/s390/crypto/des_s390.c
Simple merge

diff --cc arch/s390/crypto/ghash_s390.c
Simple merge

diff --cc arch/s390/crypto/sha_common.c
Simple merge