crypto: omap-sham - stop setting alignmask for ahashes

The crypto API's support for alignmasks for ahash algorithms is nearly
useless, as its only effect is to cause the API to align the key and
result buffers.  The drivers that happen to be specifying an alignmask
for ahash rarely actually need it.  When they do, it's easily fixable,
especially considering that these buffers cannot be used for DMA.

In preparation for removing alignmask support from ahash, this patch
makes the omap-sham driver no longer use it.  This driver did actually
rely on it, but only for storing to the result buffer using __u32 stores
in omap_sham_copy_ready_hash().  This patch makes
omap_sham_copy_ready_hash() use put_unaligned() instead.  (It really
should use a specific endianness, but that's an existing bug.)

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>