crypto: hisilicon - enable zip device clock gating

Kunpeng930 zip device supports dynamic clock gating. When executing tasks,
the algorithm core is opened, and when idle, the algorithm core is closed.
This patch enables zip dynamic clock gating by writing hardware registers.

Signed-off-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>