ARM: sun8i: Convert the A23 and A33 to the CCU

Now that we have support for the CCU driver in sunxi-ng, convert the A23
and A33 DTs to that driver.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>