crypto: hisilicon - add SRIOV for HiSilicon SEC

HiSilicon SEC engine supports PCI SRIOV. This patch enable this feature.
User can enable VFs and pass through them to VM, same SEC driver can work
in VM to provide skcipher algorithms.

Signed-off-by: Zaibo Xu <xuzaibo@huawei.com>
Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>