rockchip: rng: Add a driver for random number generator(rng) device

Add a driver for the rng device found on rockchip platforms.
Support rng module of crypto v1 and crypto v2.

Signed-off-by: Lin Jinhan <troy.lin@rock-chips.com>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
3 files changed