crypto: rockchip - move the crypto completion from interrupt context

It's illegal to call the completion function from hardirq context,
it will cause runtime tests to fail. Let's build a new task (done_task)
for moving update operation from hardirq context.

Signed-off-by: zain wang <wzz@rock-chips.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>