This patch adds System z hardware acceleration support for the GHASH
algorithm for GCM (Galois/Counter Mode).
The hardware support is available beginning with System z196.
Signed-off-by: NJan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: NGerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>