Add DT bindings documentation for the rk3288 crypto drivers.
Signed-off-by: NZain Wang <zain.wang@rock-chips.com>
Acked-by: NRob Herring <robh@kernel.org>
Tested-by: NHeiko Stuebner <heiko@sntech.de>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>