MLK-19365: crypto: gcm: Cache aligned auth_data

MLK-19365: crypto: gcm: Cache aligned auth_data

Generic GCM is likely to end up using a hardware accelerator to do
part of the job. Allocating hash, iv and result in a contiguous memory
area increases the risk of dma mapping multiple ranges on the same
cacheline. Also having dma and cpu written data on the same cacheline
will cause coherence issues.

Signed-off-by: Franck LENORMAND <franck.lenormand@nxp.com>
(cherry picked from commit 03d7978eea76a53e5e964d67898e10d143ddb83d)
Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>