crypto: qat - fix aes-xts key sizes

commit 10bb087c upstream.

Increase value of supported key sizes for qat_aes_xts.
aes-xts keys consists of keys of equal size concatenated.

Fixes: def14bfa ("crypto: qat - add support for ctr(aes) and xts(aes)")
Reported-by: Wenqian Yu <wenqian.yu@intel.com>
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>