ARM: sun8i: v3s: restore the usage of CCU definitions

All the used CCU definitions are stripped from the V3s DTSI file when
it's merged, as the DTSI file and the CCU device tree binding headers
went to different trees.

As they're all in Linus's tree now, restore the usage of the
definitions.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>