rng: rockchip: add hardware rand library

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Change-Id: Id22c5725158d86cc8a2ff80fdf09b0146d04be41

UPSTREAM: 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.

Change-Id:

UPSTREAM: 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.

Change-Id: I5be779aa08452977965d032e366f4e36c930b12e
Signed-off-by: Lin Jinhan <troy.lin@rock-chips.com>
(cherry picked from commit b072d00c225e5b8147ed7444ebeae4ddd336870b)
Signed-off-by: Lin Jinhan <troy.lin@rock-chips.com>

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UPSTREAM: dm: rng: Add random number generator(rng) uclass

Add a uclass for reading a random number seed from a random number
generator device.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>

UPSTREAM: dm: rng: Add random number generator(rng) uclass

Add a uclass for reading a random number seed from a random number
generator device.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
(cherry picked from commit a2487684003b0bc380955e1a38cdd71da3ca4366)

Change-Id: Ife2287132db695181d663653f2ceaab0e343b41f
Signed-off-by: Lin Jinhan <troy.lin@rock-chips.com>

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