Add a node for the trng found on RK3588 SoCs.
Changes in V3:
- Added Reviewed-By tag.
Changes in V2:
- None
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Sughosh Ganu <sughosh.ganu@linaro.org>