ARM: dts: sun8i: Add the H3/H5 CSI controller

The H3 and H5 features the same CSI controller that was initially found on
the A31.

Add a DT node for it.

Signed-off-by: Mylène Josserand <mylene.josserand@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>