crypto: cpt - don't sleep of CRYPTO_TFM_REQ_MAY_SLEEP was not specified

crypto: cpt - don't sleep of CRYPTO_TFM_REQ_MAY_SLEEP was not specified

There is this call chain:
cvm_encrypt -> cvm_enc_dec -> cptvf_do_request -> process_request -> kzalloc
where we call sleeping allocator function even if CRYPTO_TFM_REQ_MAY_SLEEP
was not specified.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org	# v4.11+
Fixes: 49063bdfe71a ("crypto: cavium - Add the Virtual Function driver for CPT")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>